Malicious PDF — malware analysis report

Static analysis result for SHA-256 8995db1e8dae0a62…

MALICIOUS

PDF

42.1 KB Created: 2020-08-15 18:39:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60194f7524eaf4f0c5e4c7d866fa91b5 SHA-1: 887a6bd1e1ffeeb00f4cb62d3d059db2110b23d2 SHA-256: 8995db1e8dae0a62b969218fd5734594c6ec8cf6fac0a0a4664d239c88f74187
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation or to distribute malicious content. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=anandam+full+movie++cinemavilla', which is likely used to obscure the final malicious destination. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=anandam+full+movie++cinemavilla
    • http://files.zmagazine.co/uploads/1/3/1/6/131607010/zefimo.pdf
    • http://files.asyapassinsky.com/uploads/1/3/1/4/131453252/ditigipamixete.pdf
    • http://files.beyondnailartsupply.com/uploads/1/3/1/3/131381919/4412680.pdf
    • http://tevoka.butteswcd.org/uploads/1/3/0/8/130814328/zugudakitoguna.pdf
    • http://files.fernando-guimaraes.com/uploads/1/3/0/9/130969710/livuwibuwev.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0435/3556/4949/files/vulijegunofoxukeluw.pdf
    • https://cdn.shopify.com/s/files/1/0439/3458/0891/files/kugizeroginabidu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7003/7911/files/perixadugavaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/6116/5723/files/dovemawozarikonunifoxumig.pdf
    • https://cdn.shopify.com/s/files/1/0440/0755/5222/files/milekixari.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7342/files/penguin_readers_dracula_level_3.pdf
    • https://cdn.shopify.com/s/files/1/0440/3481/8198/files/laxinepinupilafomumen.pdf
    • https://cdn.shopify.com/s/files/1/0434/5823/2473/files/39936002836.pdf
    • https://cdn.shopify.com/s/files/1/0439/8609/2190/files/biblia_hebraica_stuttgartensia_italiano.pdf
    • https://cdn.shopify.com/s/files/1/0437/1608/3877/files/foxovojisabafewupu.pdf
    • https://cdn.shopify.com/s/files/1/0439/2134/2619/files/60188691672.pdf
    • https://cdn.shopify.com/s/files/1/0431/2953/6676/files/50732222092.pdf
    • https://cdn.shopify.com/s/files/1/0428/1778/1927/files/differential_equations_blanchard.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_off00005b30.bin
23832eef0af12fab85684057c87e7e36a0cc44c99c29f30e89153e431468ded9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B30 4940 bytes
font_01_sfnt_off00006bf7.bin
e9424f49bc40ab250d62d2f63409b0311ba872a69da65ceab6b36bb871f75f09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF7 9888 bytes
font_02_sfnt_off00008e11.bin
0dd39fb99b870ba3bb02c18819726297aee91ea6e7120b665da81053bfbcdb2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E11 3348 bytes

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