Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5187715d325f247…

MALICIOUS

PDF

42.8 KB Created: 2020-08-03 14:45:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f8b96358851a995cbd148a68c362462 SHA-1: 38f23b9ee6201fcb12adb3dca9bd092020b9f6f0 SHA-256: c5187715d325f247c617e0be153e367e4a565f02d364449baf0503f8cf77ef30
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is likely intended to lead the user to a malicious site. The document body, though partially corrupted, contains text related to a schedule and the URL itself, suggesting a lure to trick users into clicking the malicious link. No scripts were extracted from this sample.

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=minneapolis+blue+line+schedule+pdf
    • http://files.iokokanoa.com/uploads/1/3/2/8/132814611/f474b377ed69.pdf
    • http://files.brocknorton.com/uploads/1/3/1/4/131406181/dubisipivide-tewiroguxakow-wojedobo-fomudagogudej.pdf
    • http://files.duncanranchwhitetails.com/uploads/1/3/0/7/130740465/gulasudavewa.pdf
    • http://files.jojoknits.com/uploads/1/3/1/4/131437074/59efe1d03758.pdf
    • https://cdn.shopify.com/s/files/1/0434/0531/2154/files/duwakedifibizogaku.pdf
    • https://cdn.shopify.com/s/files/1/0435/4605/0714/files/47119028451.pdf
    • https://cdn.shopify.com/s/files/1/0431/4166/0826/files/85173449276.pdf
    • https://cdn.shopify.com/s/files/1/0438/9080/2856/files/xafuradatonoporam.pdf
    • https://cdn.shopify.com/s/files/1/0430/8706/9335/files/wipejapoxaxaperubo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20675343362.pdf
    • https://cdn.shopify.com/s/files/1/0436/0133/0339/files/8006836707.pdf
    • https://cdn.shopify.com/s/files/1/0430/5738/1530/files/83000266209.pdf
    • https://cdn.shopify.com/s/files/1/0434/7727/0692/files/70272853523.pdf
    • https://cdn.shopify.com/s/files/1/0434/3581/9173/files/37666282009.pdf
    • https://cdn.shopify.com/s/files/1/0440/7672/8485/files/fosubu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1811/5480/files/kujilatodixiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/6777/6919/files/64456578553.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_off000069cb.bin
c265144b2073d871af10a26e7f023f7265c7cd7b8277a223cf48ed203541ba26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69CB 5292 bytes
font_01_sfnt_off00007bd1.bin
7d4ee0d203147246e2eb09b2eac8fd6e073693345c4794c23ec19939c97469be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD1 10020 bytes

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