Malicious PDF — malware analysis report

Static analysis result for SHA-256 056a0f4ed8714bb2…

MALICIOUS

PDF

43.1 KB Created: 2020-09-18 14:56:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a7694570657bef40af20f5eb4116226 SHA-1: 03548b1ee4ad0a7ef5b2df6e75ce3f4c4a3115a3 SHA-256: 056a0f4ed8714bb27997cde4f4f97ae37c00d20874ab388cb8f13ecf17215722
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high number of embedded links, many of which point to external resources, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The document body, though partially corrupted, contains the same suspicious URL, reinforcing 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.link/wix?keyword=chess+structures+a+grandmaster+guide+review
    • http://files.nvhsbusiness.com/uploads/1/3/1/8/131871871/3118262.pdf
    • http://files.hotrhythmholiday.com/uploads/1/3/2/6/132695828/e80dafa898562ba.pdf
    • http://rugasulus.anchoredsoulfit.com/uploads/1/3/0/9/130969808/16694.pdf
    • http://files.achievemediation.com/uploads/1/3/1/8/131871602/zodapovafifez_gameful_fufiwepofesiwo_rapinudilofugeb.pdf
    • http://galitos.specialtyscriptrx.com/uploads/1/3/1/3/131398560/9c071e6a21.pdf
    • http://files.ccbc-md.org/uploads/1/3/0/9/130968962/257c49.pdf
    • http://files.abundantlifemedical.com/uploads/1/3/0/7/130775922/75322d927264c15.pdf
    • http://files.heathernorman.co.uk/uploads/1/3/0/7/130739699/pobem.pdf
    • http://files.artisanstasmania.com.au/uploads/1/3/0/8/130813458/e1baf15.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/1659/1272/files/womigaxub.pdf
    • https://cdn.shopify.com/s/files/1/0437/3096/0549/files/nubumisexigesafurizejore.pdf
    • https://cdn.shopify.com/s/files/1/0432/6332/8418/files/xubimoneku.pdf
    • https://cdn.shopify.com/s/files/1/0430/4483/1386/files/boosted_rev_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9265/6799/files/19549457133.pdf
    • https://cdn.shopify.com/s/files/1/0429/5573/5203/files/94962536930.pdf
    • https://cdn.shopify.com/s/files/1/0440/3593/2310/files/map_function_in_python.pdf
    • https://cdn.shopify.com/s/files/1/0436/5916/5849/files/ups_waybill_forms.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_off000069fa.bin
be1e5664ff1a6b41a2af016be75b4231b38eeca4cbed2b3f594c5707b50e40ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69FA 5376 bytes
font_01_sfnt_off00007c25.bin
bdbabad4617390887fade5695463a02f3b001d9fb280ce9230b06306cbfb25de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C25 10232 bytes

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