Malicious PDF — malware analysis report

Static analysis result for SHA-256 09709727a5c13597…

MALICIOUS

PDF

41.9 KB Created: 2020-08-06 19:45:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07310bb51428a08db9178d7529a49137 SHA-1: fede2f711df7ab6eb887b80551fb10e8891f0656 SHA-256: 09709727a5c13597956b931c1746de24f61ab54a120b30e56547d7155029c73c
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'bipolar disorder screening pdf' and a URL that appears to be part of a link farm designed to attract traffic. The presence of many external PDF links, including those hosted on Shopify, suggests an attempt to distribute malicious content or redirect users to malicious sites.

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=bipolar+disorder+screening+pdf
    • http://files.jmn-i.com/uploads/1/3/0/8/130814642/badegumun-vafadivo.pdf
    • http://files.bskyfitness.com/uploads/1/3/0/7/130739892/widepiwugojojodosa.pdf
    • http://files.furrypeoplepetsitting.com/uploads/1/3/1/4/131484029/874385b6a19f20.pdf
    • http://files.jovisan.net/uploads/1/3/2/7/132740552/vazafajebud_kulupu_xetapafis.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6584/3620/files/24979342461.pdf
    • https://cdn.shopify.com/s/files/1/0433/3839/9912/files/kofosonamuzoxide.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5621/files/60850014337.pdf
    • https://cdn.shopify.com/s/files/1/0431/5322/7936/files/gekejutukopakiroz.pdf
    • https://cdn.shopify.com/s/files/1/0435/1829/6216/files/rejogujarepomapipefupiga.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tovunegorudakumuwi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0721/2694/files/84466380811.pdf
    • https://cdn.shopify.com/s/files/1/0437/6385/9617/files/kugupel.pdf
    • https://cdn.shopify.com/s/files/1/0430/3070/8385/files/sudupilezibibezoduxilip.pdf
    • https://cdn.shopify.com/s/files/1/0429/6278/0311/files/zudupenapomejezux.pdf
    • https://cdn.shopify.com/s/files/1/0428/2525/3023/files/nijaputatasobaluzi.pdf
    • https://cdn.shopify.com/s/files/1/0437/6294/2101/files/financial_accounting_multiple_choice_questions_and_answers.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_off000066da.bin
5b10e159d2517dface6cc7abe79239fa32c37beeeff2edef08a085c53c288f3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66DA 5372 bytes
font_01_sfnt_off0000792d.bin
e5a5e1924584c8f30dce395561c7f6463a13a10038d3a7175b3a8cd4ee4c98d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x792D 9844 bytes

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