Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b7c5c0280019e80…

MALICIOUS

PDF

41.0 KB Created: 2020-08-06 06:58:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 950c948fb27811fdbad4c60fdcae5352 SHA-1: a26f5e00d8b8056c3988a5abb63c23fbc120f981 SHA-256: 2b7c5c0280019e806e4b6fc238066398481d536465fccd96e841634039b1c91d
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating it links to known malicious redirector infrastructure, specifically `https://ttraff.com/pify?keyword=upsc+cds+eligibility+pdf`. It also exhibits characteristics of a PDF link farm, embedding numerous external PDF links, with `https://cdn.shopify.com/s/files/1/0434/7995/7669/files/xisuwup.pdf` being a prominent example. The document body, though partially corrupted, contains text related to 'Upsc cds eligibility pdf', suggesting a lure to disguise the malicious link.

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.com/pify?keyword=upsc+cds+eligibility+pdf
    • http://files.samuel-a-taylor.com/uploads/1/3/0/7/130775728/dasupuxig.pdf
    • http://files.sewchicinteriors.com/uploads/1/3/0/8/130814192/ligot.pdf
    • http://vuxosagak.berberraftingadventures.com/uploads/1/3/1/6/131606407/turimofen-wokokovamewuv-wamalegugamuvi-guxugifexasinuz.pdf
    • http://files.mrskrout.com/uploads/1/3/0/7/130739233/5641910.pdf
    • https://cdn.shopify.com/s/files/1/0434/7995/7669/files/xisuwup.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94662163826.pdf
    • https://cdn.shopify.com/s/files/1/0431/9405/6861/files/45657136411.pdf
    • https://cdn.shopify.com/s/files/1/0431/4054/6721/files/zawatixusobifi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5469/files/33564753027.pdf
    • https://cdn.shopify.com/s/files/1/0430/5354/7677/files/topotobujulimexum.pdf
    • https://cdn.shopify.com/s/files/1/0434/2120/4631/files/40006736832.pdf
    • https://cdn.shopify.com/s/files/1/0427/8904/4383/files/jawijuw.pdf
    • https://cdn.shopify.com/s/files/1/0430/6753/9623/files/kewusin.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31906594002.pdf
    • https://cdn.shopify.com/s/files/1/0429/7729/6543/files/financial_accounting_basic_concepts.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_off000062cc.bin
16788c94841be2727d8343ef2f84468df153aa68278c1fd5853965bae9a262c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62CC 5248 bytes
font_01_sfnt_off000074c8.bin
82b2bee9c9bb83d91a988a28fd8e22ea7b8312c4edc7dc0812ffecbf6fbc909b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74C8 10180 bytes

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