Malicious PDF — malware analysis report

Static analysis result for SHA-256 b46d1485e6f09674…

MALICIOUS

PDF

75.2 KB Created: 2020-07-30 13:42:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2aed0eb61f67e7c3e24970d69e9ec759 SHA-1: 295ecc16c52509f755798675bdd15750d52738dc SHA-256: b46d1485e6f09674476287eb8ef91d7d2fd8b4cfaf5b63c5471cc5f8eee211e2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

This PDF file contains numerous embedded links, a common tactic for redirecting users to malicious sites. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags a URL pointing to ttraff.com, indicating a known redirector. The PDF_SEO_LINK_FARM heuristic further supports this by identifying a large number of external PDF links, suggesting an attempt to create a link farm for SEO manipulation or to obscure the final malicious destination. No scripts were extracted from this sample, but the extensive link infrastructure strongly suggests a phishing or malware distribution campaign.

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.com/pify?keyword=circle+of+fifths+pdf
    • http://files.balmybreezetrainingcenter.com/uploads/1/3/1/3/131383864/tosadinawuzidifod.pdf
    • http://files.stmarysandstjosephs.com/uploads/1/3/0/8/130813645/jugavazanite.pdf
    • http://files.hprcsc.org/uploads/1/3/2/6/132680822/likabotiduvusut.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/16086567002.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/46693303277.pdf
    • https://cdn.shopify.com/s/files/1/0435/9127/0563/files/68596652648.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/zaluwonipajuwaninadixewo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/28917708074.pdf
    • https://cdn.shopify.com/s/files/1/0429/3692/6374/files/64429091834.pdf
    • https://cdn.shopify.com/s/files/1/0427/7318/4678/files/88664486757.pdf
    • https://cdn.shopify.com/s/files/1/0437/6055/0046/files/tigemifadunidoga.pdf
    • https://cdn.shopify.com/s/files/1/0428/1712/6567/files/23612723954.pdf
    • https://cdn.shopify.com/s/files/1/0433/1870/6331/files/dakulojodatudijusuzo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5253/1869/files/92206752811.pdf
    • https://cdn.shopify.com/s/files/1/0427/5548/9948/files/35120758035.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0d1.bin
f263d2764851dbfaf54f4153ee2135592edb5a25da98e594d9d3ccb121bc1801		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D1 4736 bytes
font_01_sfnt_off0000e0f9.bin
aaea81a04eb10a9282eb478efc6620bb43c9b99adb6213b8bb5b971e3c6557df		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F9 12660 bytes
font_02_sfnt_off000109fb.bin
fb7b45e24c28c4473d0ca1c6410c593992d9a809009f9c41b5ae32c9142507dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109FB 16120 bytes

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