Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7ef40a59d96f6b8…

MALICIOUS

PDF

45.8 KB Created: 2020-10-25 03:39:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 558e34d62393110aa2eac1fe700b43a0 SHA-1: e05a92f641c3cbcd815ea26bb21791714e0dbcbd SHA-256: e7ef40a59d96f6b88300ee01fffe1ce8faf3dcb2444d59842a714d3db785c0bc
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous links, many pointing to disposable domains, designed to redirect users to malicious content. The primary malicious URL identified is https://ttraff.club/123?keyword=aldi+application+fillable+pdf, which is presented in the context of an 'Aldi application fillable pdf'. The ML classifier strongly indicated maliciousness, and the presence of a link farm heuristic confirms the intent to distribute malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.club/123?keyword=aldi+application+fillable+pdf In PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/145769.pdfIn PDF document text
    • https://kulilopoxi.weebly.com/uploads/1/3/4/3/134375859/sulinexelobedu_sibokivasotosal_dasiliwimage_durasexo.pdfIn PDF document text
    • https://damijuvik.weebly.com/uploads/1/3/1/3/131381376/vinaruzipetaso.pdfIn PDF document text
    • https://kilejotiwig.weebly.com/uploads/1/3/1/4/131406519/6174952.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/aa92d.pdfIn PDF document text
    • https://finazodaxuvoj.weebly.com/uploads/1/3/2/6/132682535/7009348.pdfIn PDF document text
    • https://bupiwuzisulim.weebly.com/uploads/1/3/0/8/130874125/7de9fe58.pdfIn PDF document text
    • https://dojulukasinu.weebly.com/uploads/1/3/0/7/130776790/puvixerizewatul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.thdl.org/http://www.thdl.org/TibetanIn PDF document text
    • https://s3.amazonaws.com/xozeb/kumotexobo.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/71427097429.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/b._sc_nursing_syllabus_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/865ae2de-dd92-4d6a-8005-100cedc5817f/42830835359.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f11fd27-9a4b-4b5d-8fd1-8d086edf05a3/rawijodelegesasaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a99765b-aac8-4376-b61f-699621f00634/47782853768.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66589cd2-16c4-4ff7-a8d0-29b6b3d19e17/essentialism_the_disciplined_pursuit_of_less.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78f4732c-6672-4d99-9455-f6f97cb67b24/63697560861.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/0218/0006/files/kenmore_microwave_hood_combination_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3826/8318/files/62465096784.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2393/9753/files/poiseuilles_equation_derivation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/7888/4759/files/orchard_toys_yo_ho_ho_game_instructions.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlTibetanIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63AB 5004 bytes
SHA-256: 55c1d6763fbd1d30507a4380561fb87da953540cfaf1584aa0d24b6bb5e01e30
font_01_sfnt_off000074c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74C7 8976 bytes
SHA-256: 5f07b96a345167f8d597a4b3e1fe0e52dd7a62508af6f8e7b00de7561a89dfc4
font_02_sfnt_off0000868a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x868A 10292 bytes
SHA-256: d0e6730de2f3cc7a89a4bbaadaa5f733638d38de809fcfe2687a8f47f25a0c3a