Malicious PDF — malware analysis report

Static analysis result for SHA-256 1afb3b41da0a3d7b…

MALICIOUS

PDF

45.7 KB Created: 2020-08-24 06:49:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef5207c09ef50f80564f289a4061e003 SHA-1: a4e3c80b028c017dd9632bf0dd49440637123552 SHA-256: 1afb3b41da0a3d7bda49c6920299e30c655f52cce3b966ba0a03b4ac5c9f5f05
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged as malicious due to a large number of embedded links, many pointing to external PDF files, suggesting a link farm or redirection tactic. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=mobogenie+android+market'. The document body contains obfuscated text and a URL that appears to be part of this redirection scheme. The presence of numerous Shopify-hosted PDF links, while some are benign, contributes to the overall suspicious nature of the document's structure.

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=mobogenie+android+market
    • http://mebojudug.totemfoodproducts.com/uploads/1/3/1/4/131483068/tejaw.pdf
    • http://files.millerhomesgroup.com/uploads/1/3/1/4/131437775/zejogito_morasiv_tedogipifik.pdf
    • http://files.fc-ail-training.com/uploads/1/3/1/6/131606027/zibamope.pdf
    • http://vukasefap.super-sounds.com/uploads/1/3/0/9/130969280/4124705.pdf
    • https://cdn.shopify.com/s/files/1/0432/4281/5643/files/gmp_requirements_for_labeling.pdf
    • https://cdn.shopify.com/s/files/1/0431/2973/3282/files/fegizavasajo.pdf
    • https://cdn.shopify.com/s/files/1/0444/3072/1190/files/tipos_de_contaminacion_del_aire.pdf
    • https://cdn.shopify.com/s/files/1/0429/3240/4380/files/silokuvetifazegupizil.pdf
    • https://cdn.shopify.com/s/files/1/0464/6885/8024/files/tevajuxafimujedopoxebu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5010/6018/files/dalowoliweja.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vaxopegi.pdf
    • https://cdn.shopify.com/s/files/1/0428/6559/0438/files/sports_and_exercise_nutrition_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0435/7790/1219/files/bonuxuginemineg.pdf
    • https://cdn.shopify.com/s/files/1/0448/3471/7858/files/cbse_syllabus_for_class_9_science_2020_19.pdf
    • https://cdn.shopify.com/s/files/1/0432/7007/8617/files/vijixebili.pdf
    • https://cdn.shopify.com/s/files/1/0429/4469/2383/files/advanced_accounting_joint_venture.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000749a.bin
7cc484d7a05307ebccf64dd85ea35e3513d8691933bf37a6c4b1e33f601e7c22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x749A 5144 bytes
font_01_sfnt_off00008607.bin
9a4a7c014ef02ec5cf0165de27c42ddbcdfc1b46f9fc87a7af65017bf3fbd8c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8607 10620 bytes

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