Malicious PDF — malware analysis report

Static analysis result for SHA-256 6965d238738db494…

MALICIOUS

PDF

43.9 KB Created: 2020-08-31 16:41:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09d501836b333ff81fe68cfdb075cfd1 SHA-1: d1c0fe71592e8dae1f6aa8f04b792e1697eef5f0 SHA-256: 6965d238738db4943f26bd68714cdcf023376f8ae2ec194f2f1f4bd0906d1b95
154 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to a redirector service. The primary malicious link identified is https://ttraff.cc/wix?keyword=anniyan+songs++starmusiq, which is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure the user to external malicious content. The presence of numerous benign-looking PDF links likely serves to obscure the malicious intent.

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.cc/wix?keyword=anniyan+songs++starmusiq
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_3d639c7a310d48d2853b321422d04f5f.pdf
    • https://static.usrfiles.com/ugd/b8c837_2977d4f4b08f41228e7cb93640987667.pdf
    • https://static.usrfiles.com/ugd/b8c837_03469f8f1a1c4133900d943862dac300.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e8b58bd82aa49dc92c738dd33a65d70.pdf
    • https://static.usrfiles.com/ugd/906e9f_0ceeee335e514f88ad7e41ed87cf580f.pdf
    • https://static.usrfiles.com/ugd/8b9728_3daefa85d88e4f4e83bf3981914286a9.pdf
    • https://static.usrfiles.com/ugd/b8c837_1008a45a4ba04f238430997608bf6140.pdf
    • https://cdn.shopify.com/s/files/1/0430/2739/8807/files/sepigirazufitebuditud.pdf
    • https://cdn.shopify.com/s/files/1/0434/1625/6662/files/aspects_in_astrology.pdf
    • https://cdn.shopify.com/s/files/1/0427/4031/8375/files/60384023974.pdf
    • https://cdn.shopify.com/s/files/1/0434/9257/3334/files/wimorizunebuzususaxel.pdf
    • https://cdn.shopify.com/s/files/1/0437/3427/0117/files/greek_mythology_comics.pdf
    • https://cdn.shopify.com/s/files/1/0432/7427/2924/files/jowemada.pdf
    • https://cdn.shopify.com/s/files/1/0435/3831/7471/files/spectrophotometric_experiment_lab_report.pdf
    • https://cdn.shopify.com/s/files/1/0429/7038/2485/files/zuludaxeparoremamej.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_off000058af.bin
0b232b450692d0729351832c5b3ba6a6b1a377f5635a63918a8bc5e9a04291c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58AF 4952 bytes
font_01_sfnt_off0000696a.bin
2e0de52a9e32af51aade6cf1ec729c7fa599efe3d8883ed584e448b540a78b45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x696A 14060 bytes
font_02_sfnt_off000094e2.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94E2 4324 bytes

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