Malicious PDF — malware analysis report

Static analysis result for SHA-256 99d73084b8047948…

MALICIOUS

PDF

57.4 KB Created: 2020-08-05 02:46:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52ccdf626516711ffa785ca31e80f33f SHA-1: f0ea625acb4cb56425422b5e20389dfcbfa1aea6 SHA-256: 99d73084b80479488acaae5a5489a6b502bd823deead499ee3e70880b72d83d5
120 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body text, though partially corrupted, includes the phrase 'atomic structure questions pdf download' and the malicious URL, suggesting a lure to trick users into downloading further malicious content. The presence of a malicious redirector indicates an attempt to obscure the final destination of the payload.

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=atomic+structure+questions+pdf+download
    • http://files.husbandshistory.com/uploads/1/3/1/6/131637177/darunutowovejutazo.pdf
    • http://files.ironbridge-analytics.com/uploads/1/3/1/6/131606563/bodolexivedazaxubegu.pdf
    • http://files.waioratrust.com/uploads/1/3/1/8/131856476/3778717.pdf
    • https://cdn.shopify.com/s/files/1/0427/3196/2535/files/12226197943.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tevegijetowid.pdf
    • https://cdn.shopify.com/s/files/1/0427/9386/1279/files/cet_to_gmt.pdf
    • https://cdn.shopify.com/s/files/1/0431/2757/0596/files/8442439475.pdf
    • https://cdn.shopify.com/s/files/1/0432/5743/0176/files/sewowogo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7310/1214/files/19535967605.pdf
    • https://cdn.shopify.com/s/files/1/0440/0644/1110/files/27733558297.pdf
    • https://cdn.shopify.com/s/files/1/0431/7400/2837/files/lexizigosefo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5851/1510/files/gebejugo.pdf
    • https://cdn.shopify.com/s/files/1/0435/0348/5092/files/75842376108.pdf
    • https://cdn.shopify.com/s/files/1/0429/6825/2565/files/17980919647.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/nasegilozasil.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51507598499.pdf
    • https://cdn.shopify.com/s/files/1/0430/5109/0077/files/guvub.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_off00009357.bin
9933fa23f70f30b37056fa870c9196b0f618a4236997f3407b3969c932a220de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9357 5508 bytes
font_01_sfnt_off0000a60f.bin
42732f89ae63da534537fead1442113f6aee86fc20201ee99efebf23a960635b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA60F 16548 bytes

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