Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a49df5496ee08f6…

MALICIOUS

PDF

38.4 KB Created: 2020-11-04 02:40:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7a331d69d2c706a468af28d89344f4ff SHA-1: f72bab168b20498c7962055924f78f0657931948 SHA-256: 9a49df5496ee08f6b70e9542c7a340b9e91dafeedf23f82e760893d4d3bbe530
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to disposable hosting and appear to be part of an SEO link farm. One of the embedded URLs, 'https://ggtraff.ru/wb?keyword=2000%20coleman%20santa%20fe%20manual', is flagged as a known malicious redirector. This suggests the document is designed to lead users to malicious sites, potentially for further exploitation or phishing.

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://ggtraff.ru/wb?keyword=2000%20coleman%20santa%20fe%20manual In PDF document text
    • https://pezopipowom.weebly.com/uploads/1/3/1/4/131406060/5351011.pdfIn PDF document text
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/kumovetazonuzoz.pdfIn PDF document text
    • https://fiwatinizajof.weebly.com/uploads/1/3/0/8/130874156/8034535.pdfIn PDF document text
    • https://sulajaxa.weebly.com/uploads/1/3/4/3/134362611/05e4303b9dc.pdfIn PDF document text
    • https://rivisoni.weebly.com/uploads/1/3/0/7/130739016/297604.pdfIn PDF document text
    • https://kirasupi.weebly.com/uploads/1/3/4/4/134442552/7919329.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/4da98ffe-45ef-4e57-9cc2-37892e36009d/siah_siah_skullmasher_borderlands_2.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/liwubivobajodepa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc8eeef7-5ed3-4d50-8404-eeb3cb61d1c1/the_globalization_of_eating_disorders_rhetorical_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/ziteta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2b3554c-6fbd-480e-804d-e3d93630a6f1/fnaf_1_characters_in_a_nutshell.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9167928-0f91-429b-92b8-0b9e6fe61768/bujetakovoxuwi.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/beck_hopelessness_scale_bhs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6559ff5-63d0-47c3-ac64-0ce834b28b33/28998367642.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a97b673b-fe49-45e7-9c70-0d362d52ee3e/10252536651.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004be6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BE6 4944 bytes
SHA-256: fbe3a8634aafbf8d7af7553784d0ced98bd1da23a914738456ce240a06d25c4e
font_01_sfnt_off00005c92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C92 10156 bytes
SHA-256: 697fada9f200869801a8f9183432d27d42547fcefefeeab25302a64337f23f40
font_02_sfnt_off00007eed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EED 4324 bytes
SHA-256: ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c

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