Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f04d2798f4649f8…

MALICIOUS

PDF

48.6 KB Created: 2020-07-30 21:09:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d24913d450cbf65e0d62a46ce6aa1dc SHA-1: 3a8d500c87875933f7968d58a18e202a75981451 SHA-256: 0f04d2798f4649f89ad53916f0444c0b49988d11f89d8e37b2e633c989c3b62d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier also flagged the document as malicious. The presence of a link farm suggests an attempt to manipulate search engine results or direct users to malicious content, potentially for SEO spam or phishing.

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=dieta+para+balon+gastrico+pdf
    • http://files.minkywoodcock.com/uploads/1/3/1/6/131607063/8d56dcc2fe9e99.pdf
    • http://files.gwengunterart.com/uploads/1/3/0/7/130738597/sidaxizovatipevuxul.pdf
    • http://files.reneesgourmetpizzeria.net/uploads/1/3/2/3/132302848/42d904a6a35282.pdf
    • http://files.eccentricpersonas.com/uploads/1/3/1/3/131383544/751735.pdf
    • http://files.lesliemcgeaghhypnosis.com/uploads/1/3/1/3/131379650/xuruz_xapomula_wujemenejanafe_dukudu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5301/4423/files/xadoforogokijuwiwukeda.pdf
    • https://cdn.shopify.com/s/files/1/0428/9275/5103/files/supekeronidosimaxoluri.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/titigabibuzumazavuxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9574/3907/files/goxumoporojolilofanazal.pdf
    • https://cdn.shopify.com/s/files/1/0433/1218/5499/files/87118263300.pdf
    • https://cdn.shopify.com/s/files/1/0427/4061/3286/files/majagurisowiwirilexov.pdf
    • https://cdn.shopify.com/s/files/1/0430/6314/8706/files/tuzunumu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7990/1079/files/wabokoporekebubuzefulozi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2675/0357/files/26170584606.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lovukapovilelogitolosir.pdf
    • https://cdn.shopify.com/s/files/1/0437/2925/6613/files/jugexon.pdf
    • https://cdn.shopify.com/s/files/1/0431/6240/2967/files/gatoraziwixenazitajokum.pdf
    • https://cdn.shopify.com/s/files/1/0433/1703/5166/files/35906795288.pdf
    • https://cdn.shopify.com/s/files/1/0434/7917/1222/files/titimejoz.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_off00007d41.bin
cde87fe4716823a226f3056a8b5e3bdd78defd2ab3204782f1a76644ba128691		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D41 5252 bytes
font_01_sfnt_off00008f22.bin
cb96bd2d64f0621cad53b2751c9df039ba0d5472565a8fb409cb293bc20db539		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F22 11272 bytes

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