Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f07fd1ae1f8716a…

MALICIOUS

PDF

42.1 KB Created: 2020-08-03 17:12:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d9bae1b011cb609001450e47d8bd280 SHA-1: 9e440b496ae137a7cf0e225406075bc24766ab04 SHA-256: 0f07fd1ae1f8716a77ed539681b6edf55319ab6be32ee59c24fc3b7c8b19aeff
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one prominently pointing to a known malicious redirector. The document body, though partially corrupted, includes the same URL, suggesting an attempt to direct users to malicious infrastructure. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this PDF is part of a phishing or scam campaign.

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=ssc+stenographer+paper+pdf+download
    • http://files.iowaconcreteleveling.com/uploads/1/3/1/4/131437666/konolitewitak-virixa-xinumokiz.pdf
    • http://files.shahnazhomestay.com/uploads/1/3/2/6/132681772/04bef3a2e067.pdf
    • http://files.pro-consolutions.com/uploads/1/3/1/3/131379553/85512d55500435.pdf
    • http://files.dirkawalker.com/uploads/1/3/1/3/131380107/c7a8b.pdf
    • http://files.jamestingey.com/uploads/1/3/1/3/131398184/7703830.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/7246/3772/files/da_form_7223_1.pdf
    • https://cdn.shopify.com/s/files/1/0429/2883/2675/files/musakokunomotuvolamav.pdf
    • https://cdn.shopify.com/s/files/1/0437/9423/5553/files/regesiwax.pdf
    • https://cdn.shopify.com/s/files/1/0433/9816/8727/files/xuzapugagadunituxul.pdf
    • https://cdn.shopify.com/s/files/1/0430/9575/2864/files/4477013822.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7985/files/jasoxejuvukogidame.pdf
    • https://cdn.shopify.com/s/files/1/0432/3786/7687/files/35136125150.pdf
    • https://cdn.shopify.com/s/files/1/0429/9541/7237/files/febalibugakali.pdf
    • https://cdn.shopify.com/s/files/1/0428/3724/6118/files/90408673386.pdf
    • https://cdn.shopify.com/s/files/1/0434/4994/2176/files/weather_wilton_nh.pdf
    • https://cdn.shopify.com/s/files/1/0437/6523/5866/files/html_code_for_service_disply.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/tufajenav.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/64989875230.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_off0000640b.bin
fae66b525732057ada0feeb8ce82772dc01b0f07630e3f19259c61c3dda58061		 pdf-font-stream PDF embedded font (sfnt) at offset 0x640B 5612 bytes
font_01_sfnt_off00007731.bin
6356eb38bd079bac15665170a7605d4e6fe7dd260ecd8370821d1cff53200dca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7731 10864 bytes

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