Malicious PDF — malware analysis report

Static analysis result for SHA-256 751f0543ce6a388c…

MALICIOUS

PDF

57.5 KB Created: 2020-08-11 12:42:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 549a884b36cbc1a7db9ad9de321bdf26 SHA-1: 077758de94842fa9c079e9ce925e7daa8503cf87 SHA-256: 751f0543ce6a388c26ff3382828be4c0a220b3140eab01b376da6b1481063d17
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination and potentially deliver a second-stage payload. The document also exhibits characteristics of a link farm, with numerous embedded links to other PDFs, suggesting a broad distribution or SEO manipulation tactic. No scripts were extracted, but the presence of malicious links is sufficient evidence of 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.cc/pify?keyword=agni+siragugal+tamil+pdf+file
    • http://files.squaremealroundtable.com/uploads/1/3/0/7/130775380/2d262d.pdf
    • http://files.jazikatxox.com/uploads/1/3/1/3/131383864/7893133.pdf
    • http://files.graceumcwautomaarea.org/uploads/1/3/1/0/131070561/rirelosurep.pdf
    • http://rozig.themainbistro.com/uploads/1/3/1/4/131452903/wugalumabudisowejeg.pdf
    • http://files.magicfoxproducts.com/uploads/1/3/0/9/130969478/822fd6bc12a8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/7106/8565/files/30535154741.pdf
    • https://cdn.shopify.com/s/files/1/0434/7628/7648/files/39265022617.pdf
    • https://cdn.shopify.com/s/files/1/0438/0000/2717/files/45294399546.pdf
    • https://cdn.shopify.com/s/files/1/0435/7983/4531/files/que_es_baumanometro.pdf
    • https://cdn.shopify.com/s/files/1/0429/8326/0314/files/jivawuzu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4343/0305/files/10833329617.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28391359898.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7141/files/almendras_propiedades_nutricionales.pdf
    • https://cdn.shopify.com/s/files/1/0436/1751/7725/files/lujokek.pdf
    • https://cdn.shopify.com/s/files/1/0437/9174/5185/files/backwards_and_forwards_david_ball_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/4378/1792/files/43356430350.pdf
    • https://cdn.shopify.com/s/files/1/0450/9846/7480/files/health_career_pathways.pdf
    • https://cdn.shopify.com/s/files/1/0429/8034/3967/files/cultivo_de_cactus_y_suculentas.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000824f.bin
533ad16cc64daeffc9ea4a8a3774d46b977b472291f594ae1ff258b1e4542cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x824F 5120 bytes
font_01_sfnt_off0000939b.bin
aa44fbde68c4cdcc790668a6198471610eebfd90688c631a8ac3f5359503f167		 pdf-font-stream PDF embedded font (sfnt) at offset 0x939B 6368 bytes
font_02_sfnt_off0000a796.bin
52645ee3f0e415b7e36942aa7d0f0c7a2efabae69de97340a65a2f5191d07c74		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA796 10088 bytes
font_03_sfnt_off0000ca04.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA04 4324 bytes

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