Malicious PDF — malware analysis report

Static analysis result for SHA-256 735e64d9190dc416…

MALICIOUS

PDF

39.6 KB Created: 2020-08-08 23:05:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35c40bed211d13baadcf42b590452df3 SHA-1: 4c9cbbdec6c2e1d6214c284db43ae89eb9e4ea11 SHA-256: 735e64d9190dc416c8e0347d79e709f17481da8b611b00e95d62fcc33372ab02
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with one identified as a malicious redirector. The ML classifier strongly indicates maliciousness, and the presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content. The primary malicious IOC is the redirector URL, which likely leads to a phishing page or malware download.

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=balanced+scorecard+nedir+pdf
    • http://files.accesscurriculum.com/uploads/1/3/1/4/131409135/9a0fcfaf6fe.pdf
    • http://files.damascusbaptist.net/uploads/1/3/2/7/132712206/raxat.pdf
    • http://dopirod.alaasimahschool.net/uploads/1/3/1/4/131407493/582131.pdf
    • http://files.unfilteredperspectives.com/uploads/1/3/2/6/132695200/pazirarojog_jolab_pupoduziwoveza.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6527/8625/files/tixezunak.pdf
    • https://cdn.shopify.com/s/files/1/0429/5173/7498/files/pip_install_from_local_directory.pdf
    • https://cdn.shopify.com/s/files/1/0431/6823/5682/files/kilazudajigogukorowuwopow.pdf
    • https://cdn.shopify.com/s/files/1/0430/8526/7097/files/letijetapesevukotuwal.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2304/files/87232500540.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/62850776654.pdf
    • https://cdn.shopify.com/s/files/1/0428/3577/1558/files/mosoworepuziz.pdf
    • https://cdn.shopify.com/s/files/1/0434/1576/5159/files/38877302806.pdf
    • https://cdn.shopify.com/s/files/1/0430/8316/9943/files/4753497698.pdf
    • https://cdn.shopify.com/s/files/1/0432/2702/1480/files/fowulawalaki.pdf
    • https://cdn.shopify.com/s/files/1/0437/7988/3170/files/senisebujobofoz.pdf
    • https://cdn.shopify.com/s/files/1/0428/1355/4855/files/49873505484.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005dfc.bin
87bc26f4c866a1155490b7ed30716f59ee98d01a373425f6d26505829b2f0b38
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DFC 5200 bytes
font_01_sfnt_off00006fb6.bin
481e6c85df0799d339410eec43771158f39d198932975b0b8bf84311ab8ad129
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB6 10340 bytes