Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0e3b3c453fd6b79…

MALICIOUS

PDF

41.7 KB Created: 2020-08-17 03:22:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5f735c84703daf81cfc3caef026afa3 SHA-1: ce7cf558e264d54e120979eb4b5145b8e387a850 SHA-256: e0e3b3c453fd6b79ca0100139389049813bdea6e5edc1f52ff6767238999e56a
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to other PDF files hosted on Shopify. One of these links, however, redirects to a known malicious domain (ttraff.cc). This suggests a link farm or SEO poisoning attack designed to lure users to malicious content. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=angle+relationships+worksheet%2523+2+answers+key
    • http://jivapu.rawpetfoodtennessee.com/uploads/1/3/0/7/130775045/gemuru_gefowonojubevin_nadeb.pdf
    • https://cdn.shopify.com/s/files/1/0433/5783/1336/files/mafezutukupakepaxerab.pdf
    • https://cdn.shopify.com/s/files/1/0438/0911/2226/files/sleepyclasses_sociology.pdf
    • https://cdn.shopify.com/s/files/1/0434/1153/8072/files/list_of_capitals_of_all_countries_in_the_world.pdf
    • https://cdn.shopify.com/s/files/1/0434/7304/3622/files/93939983271.pdf
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/seventh_day_adventist_bible_commentary_vol_8.pdf
    • https://cdn.shopify.com/s/files/1/0434/6576/9113/files/hdfc_mutual_fund_kyc_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/0508/3811/files/rufirutogivulosopifupeni.pdf
    • https://cdn.shopify.com/s/files/1/0438/3313/1170/files/auto_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0447/8337/0397/files/adda247_banking_awareness_book.pdf
    • https://cdn.shopify.com/s/files/1/0436/9124/5733/files/rapport_building_activities.pdf
    • https://cdn.shopify.com/s/files/1/0434/5656/1318/files/tamil_nadu_budget_2020_tamil.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_off00006501.bin
7ebdde2be591e434fef454fd884e9b96e8a52d1ba566e98ab56de32e623d7dd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6501 5224 bytes
font_01_sfnt_off000076d6.bin
697f8a205e9b19e6fb3cad441042d57073cba2105355a79b96ed121c1e5664e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76D6 10428 bytes

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