Malicious PDF — malware analysis report

Static analysis result for SHA-256 8946f580068e6b6b…

MALICIOUS

PDF

61.7 KB Created: 2020-08-15 02:42:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f326cc0a66b0d9b095e78f7e99711448 SHA-1: bb194c04f47012f7eca0b58b2b0b46bbf2598b48 SHA-256: 8946f580068e6b6b72303c43c38b309db3ba1156019e0124bb82a61a3c870e3f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic. The presence of numerous external PDF links, many pointing to Shopify, suggests an attempt to obscure the true malicious destination and potentially engage in SEO manipulation for distribution. No scripts were extracted, but the primary attack vector appears to be the malicious URL.

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=2017+nba+mock+draft+bleacher+report
    • http://jadufuf.voetlichtpedicure.nl/uploads/1/3/2/3/132302780/cfc9e.pdf
    • http://boxuxatod.highpointoutfitters.com/uploads/1/3/0/7/130739540/4320786.pdf
    • http://files.cmurillo.com/uploads/1/3/2/7/132740329/97b2d1590d8.pdf
    • http://furet.trinitylearningministry.org/uploads/1/3/2/6/132682878/e34506507.pdf
    • http://files.deesinhadesign.com/uploads/1/3/1/4/131437246/29907.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0427/6014/3014/files/77590239409.pdf
    • https://cdn.shopify.com/s/files/1/0428/9029/7503/files/14065498014.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/feterobugawimizejiwet.pdf
    • https://cdn.shopify.com/s/files/1/0434/1045/6726/files/62846345837.pdf
    • https://cdn.shopify.com/s/files/1/0428/9688/3868/files/5453658388.pdf
    • https://cdn.shopify.com/s/files/1/0433/5419/4085/files/zatupulidakedu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8151/5673/files/69036889162.pdf
    • https://cdn.shopify.com/s/files/1/0435/0921/9492/files/kufuju.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_off0000a6a1.bin
0b493be5f6baf256cd7ca94c33e7ce0f7d779464ded96b5e17ec2237af71521f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6A1 5472 bytes
font_01_sfnt_off0000b902.bin
d163a0cab0585c455df66492d0936f6fb741211a24fc5d03763b4b740f89a967		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB902 10112 bytes
font_02_sfnt_off0000db9a.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9A 4324 bytes

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