Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c3f6ff4bc892c59…

MALICIOUS

PDF

44.4 KB Created: 2020-08-01 07:22:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5558b5cf26911da13244c9e8d4308764 SHA-1: 5ae8907692fe78c7b4b1e9396ac1bde250d24eda SHA-256: 5c3f6ff4bc892c59c508ea001e4980bba482ce44afee412846aa1f1f89a8df71
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to other PDFs hosted on Shopify. One of these links, 'https://ttraff.ru/pify?keyword=harley+davidson+parts+manual+pdf+free', is identified as a malicious redirector. This suggests the document is part of a link farm designed to lead users to malicious content, likely as a phishing or scam lure. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.ru/pify?keyword=harley+davidson+parts+manual+pdf+free
    • http://files.asgfitness.com/uploads/1/3/1/8/131856232/laluvaruj-penajugexo.pdf
    • http://files.copybyvan.com/uploads/1/3/1/4/131453213/kufij_zotajojidat_xusinemef.pdf
    • http://files.ausablevalleytrailriders.com/uploads/1/3/1/3/131380871/rijobi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/6558/1469/files/giwimulupilixizis.pdf
    • https://cdn.shopify.com/s/files/1/0434/9070/5574/files/sorolikopozebo.pdf
    • https://cdn.shopify.com/s/files/1/0429/1877/2903/files/zobulavemigejupigovesavop.pdf
    • https://cdn.shopify.com/s/files/1/0428/9229/6359/files/94616739583.pdf
    • https://cdn.shopify.com/s/files/1/0431/1928/0288/files/27819112774.pdf
    • https://cdn.shopify.com/s/files/1/0431/0876/1764/files/fidojafuwudikolo.pdf
    • https://cdn.shopify.com/s/files/1/0437/1814/8261/files/zulunupipopedaxov.pdf
    • https://cdn.shopify.com/s/files/1/0434/3798/1852/files/96839778772.pdf
    • https://cdn.shopify.com/s/files/1/0431/7242/9980/files/tenisonidud.pdf
    • https://cdn.shopify.com/s/files/1/0429/2273/7830/files/fakemedumoxowexotasonem.pdf
    • https://cdn.shopify.com/s/files/1/0428/5100/8671/files/73026203532.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000617c.bin
9e601a5e8bf8dc3b009d318d5804b24836e15f5df1866aac19d4e48b223fe4aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x617C 5192 bytes
font_01_sfnt_off00007316.bin
d2659f9ef3d3fe7db2e66448c8eb50bc6e91cf49bcebc196e8090ac0d52a289f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7316 10480 bytes
font_02_sfnt_off000096e5.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96E5 4324 bytes

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