Malicious PDF — malware analysis report

Static analysis result for SHA-256 07ce4fa3ed456d46…

MALICIOUS

PDF

57.1 KB Created: 2020-08-09 11:03:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a9a837bbdc36965c45df282dd5c94ba SHA-1: e4b0405dd817d2966a01bac82d94964c89f56135 SHA-256: 07ce4fa3ed456d46dc1b72322e28ad4531a79d451580124c16b1f429c541c0cd
154 Risk Score

Malware Insights

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

The PDF document was flagged for containing malicious redirector links and a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. One of the primary links directs to 'ttraff.com', a known malicious redirector. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest an attempt to lure users to malicious content or to manipulate search engine results.

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.com/pify?keyword=bsc+nursing+college+in+west+bengal+pdf
    • http://punuzagax.cleosboutiqueshop.com/uploads/1/3/1/0/131070420/gugevil.pdf
    • http://files.whenyousuckatrunning.com/uploads/1/3/1/4/131453684/fuvudajexaxop_xemilafojokid_rubuzaxa.pdf
    • http://files.careyreidkirkinc.com/uploads/1/3/0/8/130874086/sufeb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/0176/6310/files/33881650772.pdf
    • https://cdn.shopify.com/s/files/1/0435/7108/5475/files/ignou_ma_assignment_2020_19_solved.pdf
    • https://cdn.shopify.com/s/files/1/0431/7242/9980/files/sotigamasikoxufenewu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5107/3174/files/vovetomef.pdf
    • https://cdn.shopify.com/s/files/1/0431/8098/2438/files/atrophic_rhinitis_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0432/8256/3232/files/tulowupaxabaxujuganep.pdf
    • https://cdn.shopify.com/s/files/1/0431/5768/4375/files/23534657196.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27360052690.pdf
    • https://cdn.shopify.com/s/files/1/0433/3466/4347/files/zufitejajetara.pdf
    • https://cdn.shopify.com/s/files/1/0437/5438/9665/files/kojinax.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a9d.bin
3b354faf196b91e341a18a82025f207510b14d7eb4cbe610743c5f98420cddaf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A9D 5604 bytes
font_01_sfnt_off00008dc6.bin
1d739be46a300e0470098b03cb3525ce218fda25c712b9663aaff7a7ecef4354		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DC6 2108 bytes
font_02_sfnt_off00009794.bin
48685ed386d61cb0c64c0f3ef596d1f59ce5ffbf6756be943c4def37f4eb62e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9794 10768 bytes
font_03_sfnt_off0000bc8f.bin
3e12a7f387cc50884729203b8f1d23d1c7978f8f6596390b79894c7b00fff504		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC8F 17636 bytes

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