Malicious PDF — malware analysis report

Static analysis result for SHA-256 034c54ad570379c5…

MALICIOUS

PDF

103.1 KB Created: 2020-08-20 08:53:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a785e34bc98f3b61c315350823af93d SHA-1: 56b7ac65524611b0e794e5809ce192b08d3fd8d4 SHA-256: 034c54ad570379c5c2975bffe55c16c67b4e1d847744aedeb0bb27f7b1750981
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious URL, identified as a link farm. The document body, though heavily obfuscated, contains text referencing a 'Bmw x1 2014 manual' and the malicious URL, suggesting a phishing or scam attempt. The ML classifier strongly indicated maliciousness, and the PDF structure itself contained suspicious elements.

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=bmw+x1+2014+manual
    • http://files.davidstaniforth.co.uk/uploads/1/3/0/7/130776409/8910665.pdf
    • http://files.alises-bakery.com/uploads/1/3/0/7/130775435/zuvimukopaguw.pdf
    • http://pariziji.armisteadfarms.com/uploads/1/3/0/7/130739845/9130b5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9548/1750/files/87589628756.pdf
    • https://cdn.shopify.com/s/files/1/0429/2391/7478/files/xivefusij.pdf
    • https://cdn.shopify.com/s/files/1/0437/9102/4280/files/rogusururufunekavek.pdf
    • https://cdn.shopify.com/s/files/1/0433/3935/0181/files/tonedonidirarupot.pdf
    • https://cdn.shopify.com/s/files/1/0432/8318/5819/files/biografia_anisio_teixeira.pdf
    • https://cdn.shopify.com/s/files/1/0435/3723/6119/files/biology_question_paper_for_class_11.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2093/files/onelogin_ad_connector.pdf
    • https://cdn.shopify.com/s/files/1/0428/1778/1927/files/49618277243.pdf
    • https://cdn.shopify.com/s/files/1/0430/4669/9165/files/4032578158.pdf
    • https://cdn.shopify.com/s/files/1/0435/4893/4295/files/30589376066.pdf
    • https://cdn.shopify.com/s/files/1/0435/4605/0714/files/antony_and_cleopatra_sparknotes.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014bea.bin
aa7ec14ba9239a38a941b5e6c38175993d9e06e3c744d49b1a041a24215b2e20
pdf-font-stream PDF embedded font (sfnt) at offset 0x14BEA 5180 bytes
font_01_sfnt_off00015d94.bin
b92ebe4bd3bc3d1b9eabbb46ec72ba7af495eeacaf643e830271bd2f0f9f340d
pdf-font-stream PDF embedded font (sfnt) at offset 0x15D94 16088 bytes