Malicious PDF — malware analysis report

Static analysis result for SHA-256 65d3e63cb73b796e…

MALICIOUS

PDF

44.2 KB Created: 2020-08-08 05:13:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b4afb0283a8f0c398e10483db4d7c36 SHA-1: cd6d960535aefdaf3b818bb2d0d7e7ed5c9a4f30 SHA-256: 65d3e63cb73b796e9cec3d7bab3985c3ba20545464cec0508775e5119f6a106f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, including one pointing to a known malicious redirector at `https://ttraff.ru/pify?keyword=rearrange+pages+in+pdf+adobe+reader+x`. This suggests the document is designed to lead users to malicious infrastructure, likely for further exploitation or phishing. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm strategy to potentially improve SEO for malicious content or to distribute payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=rearrange+pages+in+pdf+adobe+reader+x
    • http://files.gabrielleosborne.com/uploads/1/3/1/3/131380158/1347018.pdf
    • http://files.sylrossi.com/uploads/1/3/0/7/130739232/tigilavajev.pdf
    • http://xirosupi.queenofwandstarot.net/uploads/1/3/1/0/131070450/xapedesubu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/20099907496.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7082322425.pdf
    • https://cdn.shopify.com/s/files/1/0434/2392/4376/files/tufup.pdf
    • https://cdn.shopify.com/s/files/1/0430/9132/9173/files/2736268292.pdf
    • https://cdn.shopify.com/s/files/1/0431/6394/3067/files/ccure_9000_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/4484/7261/files/fasozurogupukuxor.pdf
    • https://cdn.shopify.com/s/files/1/0445/9918/1476/files/type_2_diabetes_for_dummies.pdf
    • https://cdn.shopify.com/s/files/1/0432/1447/1330/files/noresibasosezux.pdf
    • https://cdn.shopify.com/s/files/1/0440/6670/1477/files/lewuxemuzi.pdf
    • https://cdn.shopify.com/s/files/1/0428/2299/2028/files/nusipo.pdf
    • https://cdn.shopify.com/s/files/1/0429/4764/1510/files/xuwakuvobiwokobija.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061d1.bin
f5477b56e4fb59d445603f41eaa4f954a43c7d5519c00bad8416e20be8561388		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61D1 5100 bytes
font_01_sfnt_off0000732e.bin
7ff991bc6338c9d06f3cda857ae6619fa359ec758474905d311d819b9822f99c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x732E 10112 bytes
font_02_sfnt_off000095c1.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95C1 4324 bytes

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