Malicious PDF — malware analysis report

Static analysis result for SHA-256 dac0e9157d644bc3…

MALICIOUS

PDF

41.6 KB Created: 2020-08-16 21:58:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f45a53c054ae85a0dbf5a56a69adaea2 SHA-1: 3d8bf6650bc53ff3c31fe161318f32d4a0c68fe0 SHA-256: dac0e9157d644bc32ebb2524de1f0b03ec5d7932d102faafa11560154d43ad5f
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=damage+report+template+free'. This indicates the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility. No scripts were extracted, but the malicious redirector is a strong indicator 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=damage+report+template+free
    • http://fifetonaz.undertheirrelevance.com/uploads/1/3/1/3/131383647/7a517.pdf
    • http://files.sobochurchofchrist.com/uploads/1/3/1/1/131164273/e15bb92cf.pdf
    • http://files.longwayroundfarm.com/uploads/1/3/1/3/131384098/tonisuragunixi_gesefafare_jizuj_repeborovazetit.pdf
    • http://files.13rays.org/uploads/1/3/0/7/130775180/4651809.pdf
    • https://cdn.shopify.com/s/files/1/0432/6889/8966/files/25324604955.pdf
    • https://cdn.shopify.com/s/files/1/0428/2331/9715/files/bamerikizojixemidabawiwu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1386/4615/files/dojawanotujugujaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/5506/2938/files/7100920808.pdf
    • https://cdn.shopify.com/s/files/1/0428/1548/8163/files/pdf_file_convert_to_excel_video.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70686619693.pdf
    • https://cdn.shopify.com/s/files/1/0431/9471/2228/files/81104274992.pdf
    • https://cdn.shopify.com/s/files/1/0440/3114/8197/files/arable_crop_farming.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/67292510822.pdf
    • https://cdn.shopify.com/s/files/1/0432/1483/1780/files/que_significado_tiene_la_palabra_languidez.pdf
    • https://cdn.shopify.com/s/files/1/0431/5339/1765/files/bookmark_acrobat_reader_dc.pdf
    • https://cdn.shopify.com/s/files/1/0432/4681/3344/files/behavioral_approach_of_management.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_off00006659.bin
c49bf0a678304fc6a2179455755058bf6bf9c0cebc9b0b75657850a0f65f7101		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6659 5040 bytes
font_01_sfnt_off00007772.bin
7823f68c3ce544b9b885a1c16a2fcd6ad56676c5d47e77eb1d386277a6a6ef0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7772 10060 bytes

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