Malicious PDF — malware analysis report

Static analysis result for SHA-256 586c0ba96a31d33b…

MALICIOUS

PDF

49.7 KB Created: 2020-08-06 19:12:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea92c6134ecd62421d118920fdd07c00 SHA-1: 4d853c88fec978abd42077c41499c23bb12fd459 SHA-256: 586c0ba96a31d33b012eb9ee14729239b1ca15d8f25f76ef2fe9640e6a7b6bf9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at ttraff.ru. This suggests a link farm or SEO poisoning tactic to distribute malicious content. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves luring users to a malicious URL disguised as a PDF download.

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=aedes+aegypti+life+cycle+pdf
    • http://jinagoja.theresagooby.com/uploads/1/3/1/4/131454065/sagajet.pdf
    • http://files.simixlaundrydetergent.com/uploads/1/3/1/6/131606965/tojigupaxikiramimur.pdf
    • http://files.farmingo.org/uploads/1/3/1/4/131438477/vorelo.pdf
    • http://files.ensemblemusicahumana.com/uploads/1/3/0/9/130969545/zusodevivi.pdf
    • http://files.beckymathisportraits.com/uploads/1/3/1/4/131407138/gobivozegafe_wediparexoto.pdf
    • https://cdn.shopify.com/s/files/1/0435/1678/8890/files/jiguxaposare.pdf
    • https://cdn.shopify.com/s/files/1/0435/6859/5112/files/code_blocks_in_discord.pdf
    • https://cdn.shopify.com/s/files/1/0435/3199/3242/files/duluk.pdf
    • https://cdn.shopify.com/s/files/1/0428/0749/2775/files/65181907774.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/1787755188.pdf
    • https://cdn.shopify.com/s/files/1/0439/6656/2462/files/80166614402.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xikosimuzewenox.pdf
    • https://cdn.shopify.com/s/files/1/0430/0891/7657/files/19544079601.pdf
    • https://cdn.shopify.com/s/files/1/0434/7183/1193/files/52837721254.pdf
    • https://cdn.shopify.com/s/files/1/0431/5637/3659/files/javineluzevubet.pdf
    • https://cdn.shopify.com/s/files/1/0430/9411/4453/files/31337280594.pdf
    • https://cdn.shopify.com/s/files/1/0430/8844/5604/files/70100661401.pdf
    • https://cdn.shopify.com/s/files/1/0435/7075/7795/files/contoh_ptk_biologi_sma.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008392.bin
0a9380ba61486250943d3d120ed4b25138fed2014f8a8a6f2e6af77b8527313d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8392 5316 bytes
font_01_sfnt_off000095d1.bin
9ba6de5e06085a35a323180214a87c6f552d7e538537c3e37d2ba3abe4c13b84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95D1 10820 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.