Malicious PDF — malware analysis report

Static analysis result for SHA-256 aff729527277e8f9…

MALICIOUS

PDF

44.4 KB Created: 2020-07-29 09:29:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba7902ea95f68fe1811745cca03e8ff0 SHA-1: ed2957b320c79ad1a5b062946a5348cf4fa470b4 SHA-256: aff729527277e8f969ec0021c159c5b947ed9480bd485cb085f522f2d6be2b5b
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=author%2527+s+purpose+activity+2+worksheet+answers'. This URL is likely intended to lure users into clicking by appearing as a legitimate worksheet answer key. The file also exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify, though the primary malicious link is the ttraff.ru domain.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=author%2527+s+purpose+activity+2+worksheet+answers
    • http://files.brandonmoorecomposition.com/uploads/1/3/0/8/130873708/duwikatika_jokoliwo_deworalew.pdf
    • http://files.fustlerthefemalehustler.com/uploads/1/3/0/7/130739839/gaxiwoloxakutenuboj.pdf
    • http://files.greentarafarm.com/uploads/1/3/1/6/131606434/nazezumitesabegule.pdf
    • http://files.greentarafarm.com/uploads/1/3/1/6/131
    • https://cdn.shopify.com/s/files/1/0427/9320/5916/files/31703563342.pdf
    • https://cdn.shopify.com/s/files/1/0437/8247/1837/files/korodepabo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7092/2655/files/zikebokebu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5891/3689/files/bugukumaluk.pdf
    • https://cdn.shopify.com/s/files/1/0432/1466/7934/files/77261411229.pdf
    • https://cdn.shopify.com/s/files/1/0433/8073/6150/files/solesonawemoniranas.pdf
    • https://cdn.shopify.com/s/files/1/0432/6621/2003/files/ninudazalavuzujovofunux.pdf
    • https://cdn.shopify.com/s/files/1/0437/4324/8533/files/2917086414.pdf
    • https://cdn.shopify.com/s/files/1/0431/2429/3796/files/fagesarobufuri.pdf
    • https://cdn.shopify.com/s/files/1/0430/4375/0049/files/1878296064.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/19515488156.pdf
    • https://cdn.shopify.com/s/files/1/0434/5446/4165/files/gesonepawixexisedux.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zijuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/0564/8801/files/mizolavexu.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_off00007042.bin
53c31106f631df295ef2a3db604569aeee70fff48d6f94db15937f57d2287ea1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7042 5344 bytes
font_01_sfnt_off0000828d.bin
5e01ebb93ca54d4c4d9c1f775890c5455b0808463cb50ce4c504eddcef0f17f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x828D 9856 bytes