Malicious PDF — malware analysis report

Static analysis result for SHA-256 09a2be93a4b6f260…

MALICIOUS

PDF

42.0 KB Created: 2020-08-06 11:24:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffaa245f98f42f9b5801fbd558c97978 SHA-1: c880f9eb236156d8da20ecab6c10294c051687f2 SHA-256: 09a2be93a4b6f2604e814651f110ef57155fd9c701ac549078db339023de7275
154 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure. It also contains a large number of external PDF links, suggesting a link farm or SEO poisoning attempt. The embedded URLs, particularly the one pointing to 'ttraff.ru', are highly suspicious and likely lead to malicious content or further redirection. No scripts were extracted, but the PDF structure itself is designed to drive traffic to potentially harmful sites.

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.ru/pify?keyword=aflatoon+history+in+urdu+pdf
    • http://files.lithgowagedcareltd.com/uploads/1/3/0/7/130776033/nawag-xalaxixavixilas.pdf
    • http://files.mvbands.org/uploads/1/3/1/3/131378993/galebabipogagewefil.pdf
    • http://files.mallencunningham.com/uploads/1/3/1/4/131482931/zafizesi.pdf
    • http://files.thenauticalartsworkshop.com/uploads/1/3/1/6/131606035/bikebawifutir.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/1818/1016/files/basho_haiku.pdf
    • https://cdn.shopify.com/s/files/1/0430/8015/5290/files/27637429687.pdf
    • https://cdn.shopify.com/s/files/1/0431/1636/3927/files/48291527699.pdf
    • https://cdn.shopify.com/s/files/1/0433/2421/1354/files/lenijaxu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8741/9805/files/88544635309.pdf
    • https://cdn.shopify.com/s/files/1/0433/0035/6251/files/97109302763.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/surorut.pdf
    • https://cdn.shopify.com/s/files/1/0447/9765/7248/files/dewalt_planer_dw734_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/8683/2035/files/54712609379.pdf
    • https://cdn.shopify.com/s/files/1/0427/8226/1415/files/negojugon.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00008167.bin
856969c5bd218afc909d4a36c8667db90ffb29bdbd0ea34b6bb33a4ba058ff2f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8167 16804 bytes
font_00_sfnt_off00004c2e.bin
91cc975d9856dd5322f6b44d7cede28ef8d8210795f1bf773e13159bd97e896a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C2E 5220 bytes
font_01_sfnt_off00005df6.bin
2e73785de247e73d6e3e6868debd23f52ea08b0f710a3f0a6b66a1e76b2dca94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF6 10372 bytes

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