Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ddc75c5127bad19…

MALICIOUS

PDF

66.9 KB Created: 2020-08-12 09:56:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88b1e31d659e3f8a3a88e4849dd4f395 SHA-1: a6da735cc5f77138676d74a00a6acd384e587415 SHA-256: 8ddc75c5127bad19a69db0efa97a47f50612f161d8e135b8a42c424c7eabbe1e
128 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing for 'PDF_SEO_LINK_FARM'. One of these links, 'https://ttraff.ru/pify?keyword=racemic+epinephrine+davis+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains fragments that suggest a lure related to 'racemic epinephrine davis pdf' and mentions urgency, aligning with phishing or scam tactics. The presence of multiple benign Shopify links alongside the malicious one suggests an attempt to blend in.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=racemic+epinephrine+davis+pdf
    • http://gumubinin.oakleighminiatures.co.uk/uploads/1/3/0/8/130874254/bumegusujumo.pdf
    • http://xafaxemas.pittrelive.org/uploads/1/3/0/9/130969723/f2d7eb2b99.pdf
    • http://files.schsprojectgraduation.com/uploads/1/3/1/6/131607158/0b3284372f3d.pdf
    • http://jegag.triplecrownbaseball.com/uploads/1/3/0/8/130874330/xegalowevagufipadaba.pdf
    • http://files.appalachian-auditorium.org/uploads/1/3/1/4/131410812/8850719.pdf
    • https://cdn.shopify.com/s/files/1/0433/9525/2374/files/strategic_management_14th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6480/files/consonants_blends.pdf
    • https://cdn.shopify.com/s/files/1/0429/2762/0249/files/digestion_quimica_y_mecanica.pdf
    • https://cdn.shopify.com/s/files/1/0435/4031/6319/files/36411195290.pdf
    • https://cdn.shopify.com/s/files/1/0436/1004/6621/files/fire_emblem_warriors_marth.pdf
    • https://cdn.shopify.com/s/files/1/0433/3296/0409/files/akami_netsession_client.pdf
    • https://cdn.shopify.com/s/files/1/0431/2167/2356/files/mexijozodorafivefe.pdf
    • https://cdn.shopify.com/s/files/1/0427/5725/9420/files/volabodakomelewun.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wadilizesiwegokadokepub.pdf
    • https://cdn.shopify.com/s/files/1/0435/2180/2404/files/kobimuzinebufefadajopot.pdf
    • https://cdn.shopify.com/s/files/1/0436/5497/1557/files/gitusivefukifopuvuwefar.pdf
    • https://cdn.shopify.com/s/files/1/0428/6296/8991/files/august_calendar_2020_printable.pdf
    • https://cdn.shopify.com/s/files/1/0434/3100/2264/files/el_anarquista.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc0a.bin
c6945f082247b4445069cca8a5b0f99a581eb5b4f7485cb769d342e47bc01334		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC0A 5028 bytes
font_01_sfnt_off0000cce9.bin
9648bb6c141cfd87fe356ef3e3620bf145e512ef2ce3b3ce7b4f30b9adca295f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCE9 10304 bytes
font_02_sfnt_off0000f018.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF018 4324 bytes

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