Malicious PDF — malware analysis report

Static analysis result for SHA-256 f192aa4047190a45…

MALICIOUS

PDF

45.5 KB Created: 2020-08-08 19:12:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e49f17ffee0b256e608d8d8b80f9e2d3 SHA-1: 70478e19fc1fef42f243387252fb2847156588b0 SHA-256: f192aa4047190a45035341779a3fd1dc05520a506902840274cc5a850f916c42
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing for a malicious redirector link to 'ttraff.cc'. Another critical heuristic indicates a PDF link farm, with many URLs pointing to Shopify domains, likely for SEO poisoning or to host malicious content. The ML classifier strongly flagged this PDF as malicious. The document body is heavily obfuscated but contains the malicious redirector URL.

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/wb?keyword=era%20mesozoica%20resumen%20pdf
    • http://luxevi.livalittlecc.org/uploads/1/3/1/6/131637814/4471671.pdf
    • http://files.jaynardiscounts.com/uploads/1/3/0/9/130969384/ecec3508f.pdf
    • http://navaf.juniorbearbooks.com/uploads/1/3/1/4/131453698/widiguze.pdf
    • http://files.humanresourcesolutionsllc.com/uploads/1/3/1/3/131380626/2ac1f6430918.pdf
    • https://cdn.shopify.com/s/files/1/0438/6576/8096/files/riligoregu.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/age_of_luxaire_furnace.pdf
    • https://cdn.shopify.com/s/files/1/0434/1458/5509/files/learn_calligraphy_book.pdf
    • https://cdn.shopify.com/s/files/1/0444/1587/7286/files/hospital_waste_management_thesis.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/iam_751_boeing_contract.pdf
    • https://cdn.shopify.com/s/files/1/0435/4945/8591/files/11440768945.pdf
    • https://cdn.shopify.com/s/files/1/0434/4794/3330/files/effects_of_globalisation_in_zimbabwe.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/60426435347.pdf
    • https://cdn.shopify.com/s/files/1/0428/4815/7859/files/88496007052.pdf
    • https://cdn.shopify.com/s/files/1/0431/2832/4257/files/vewuferozikad.pdf
    • https://cdn.shopify.com/s/files/1/0434/7183/1193/files/tejulumokowozedodupitu.pdf
    • https://cdn.shopify.com/s/files/1/0433/2381/8139/files/sililiruramovi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2779/9969/files/tukiwujodonivatagarisatu.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_off000070c3.bin
3136dd9f9eda2b4800eba2f5a9e4311e8ef45b57a97915cbd5e379d4968576af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70C3 5276 bytes
font_01_sfnt_off000082ac.bin
a136d3ca8f2b1e09796a65b2adc6070983a19fec79c5f0dad215e930dbcd5a27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82AC 11448 bytes

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