Malicious PDF — malware analysis report

Static analysis result for SHA-256 a851b13dc3007de0…

MALICIOUS

PDF

37.7 KB Created: 2020-07-25 07:38:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70541bc9f8672e7c1391662998e23d5e SHA-1: f29d92bde2344e04dbc497fd017ee7ca7d42904c SHA-256: a851b13dc3007de0a8acbe4f0cfdf1ccfcbe4df4eed48808bae6f7d01a710d64
120 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with a critical heuristic firing for a PDF link farm. One of these links, 'https://ttraff.cc/pify?keyword=athletics+logo+free', points to known malicious redirector infrastructure. This suggests the document's primary purpose is to lure users to malicious sites, likely for phishing or to download further malware.

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=athletics+logo+free
    • http://files.cutsbyvantilburg.com/uploads/1/3/0/8/130874204/e953d7af1f.pdf
    • http://files.signaturekeynotes.com/uploads/1/3/1/3/131381602/e07f75429e72.pdf
    • http://files.visualsofjessicasolis.com/uploads/1/3/1/6/131637853/xuked.pdf
    • http://files.pinktshirtday.ca/uploads/1/3/1/4/131453496/5511379.pdf
    • http://files.cutsbyvantilburg.c
    • https://cdn.shopify.com/s/files/1/0427/9602/3975/files/bogaboruvuru.pdf
    • https://cdn.shopify.com/s/files/1/0433/0412/4580/files/fidageduvunowav.pdf
    • https://cdn.shopify.com/s/files/1/0431/4398/7361/files/30187476740.pdf
    • https://cdn.shopify.com/s/files/1/0430/9234/4999/files/86136197874.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7082322425.pdf
    • https://cdn.shopify.com/s/files/1/0428/8482/5247/files/jewixodudesivomukadide.pdf
    • https://cdn.shopify.com/s/files/1/0427/5997/9174/files/sadisawo.pdf
    • https://cdn.shopify.com/s/files/1/0435/4280/6680/files/98845062846.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/miziveb.pdf
    • https://cdn.shopify.com/s/files/1/0433/3531/9711/files/lageziruleruvagijozuwere.pdf
    • https://cdn.shopify.com/s/files/1/0430/7078/3645/files/walowagelawobewadi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5020/4327/files/kajefewekolisuse.pdf
    • https://cdn.shopify.com/s/files/1/0432/4599/4146/files/68581403135.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56751463133.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_off000059a8.bin
873b94a4b6fb98148607bc3104e76776763b1dd6e392b5d807bc308b90a84162		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59A8 4604 bytes
font_01_sfnt_off00006960.bin
18ebae5d3d4943187cc7265e53cff44343855f017b9f3f48e8e7b3829dacbe97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6960 9524 bytes

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