Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b45c49ec5d25ad6…

MALICIOUS

PDF

47.1 KB Created: 2020-10-24 15:41:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: a391f0acb43666bbf5b56e8eebb5fb55 SHA-1: 4ed4ebdd6dfa0de172d851a0b7b288bc99cf68ec SHA-256: 6b45c49ec5d25ad638b8ddfbd79fe4c6af15f47b81574e790abd03807fa9222b
194 Risk Score

Malware Insights

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

The PDF file contains numerous links to external PDF files hosted on Weebly and other platforms, forming a link farm. One of the primary links, https://gettraff.ru/pify?keyword=teleguide+marche+au+puce+metropolitain, is identified as a malicious redirector. The ML classifier strongly indicates maliciousness, and the overall structure suggests a phishing or malware distribution attempt.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://gettraff.ru/pify?keyword=teleguide+marche+au+puce+metropolitain In PDF document text
    • https://netaluzubik.weebly.com/uploads/1/3/0/8/130813777/pigora.pdfIn PDF document text
    • https://wuvirinofibugiz.weebly.com/uploads/1/3/1/0/131070402/986ca1.pdfIn PDF document text
    • https://pamaridefudeluz.weebly.com/uploads/1/3/0/7/130776324/nuwamepuwuxegu-roxawozijujuwe.pdfIn PDF document text
    • https://vedabigejiko.weebly.com/uploads/1/3/1/4/131438046/e7bd111eb83ff.pdfIn PDF document text
    • https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/d7f63477585.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/360953b2-e467-4e5b-80e5-87a80ae4b2b7/bedekekij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0781d40-4d8b-4df8-a51c-6bedb3568593/60307432697.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/duxojenusegopojetil.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/protein_metabolism_in_liver.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/15162828985.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/consonant_and_vowel_sounds.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/87140807904.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf086313-d044-47ce-98a1-767e1ca3255c/digimon_card_value.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6585f45b-7184-45d6-9abd-33cdf436f4ad/mezopoxedabo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73954490-7f59-4202-9c2e-9aa94d339158/27009595881.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/524af526-24a5-4429-9d37-d3979e4ba066/kuwetenipolu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f56573c-e61e-4c7c-af49-282debab06ee/sutukeguketajomonim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48328dc3-afdd-4f61-b2f8-fb9585503615/zilamidogovetip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/725ce0f4-6343-44a6-bdf1-984bc55c538b/depomedegilidurakarixa.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_off0000665b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x665B 5140 bytes
SHA-256: f276864dd46c4da9099b2a06e136dc9c562d2dbab4f57cd5959a326707f36e87
font_01_sfnt_off000077a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77A8 12412 bytes
SHA-256: c24bbca73505948054fc721ebc9a8418f98f688d533d744d2bf94c3415dcc760
font_02_sfnt_off00009ef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EF3 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e