Malicious PDF — malware analysis report

Static analysis result for SHA-256 c78d5b5c0e0cc523…

MALICIOUS

PDF

45.5 KB Created: 2020-08-09 13:55:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a6847ac67a16d4f2ce83846463671e9 SHA-1: 604d086eef2a73739686ea0f2a28f06753f6a1f7 SHA-256: c78d5b5c0e0cc5230d300cdf488138a37edb34c7f2aa1ddd7714b5ea88477d1f
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a technical document. The link leads to `ttraff.cc`, which is known to host malicious content. The document body itself contains obfuscated text and the malicious URL, indicating an attempt to trick the user into navigating to a harmful site. No scripts were extracted, but the presence of multiple external links, many pointing to Shopify, suggests a link farm or redirection strategy.

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=spreader+beam+calculation+pdf
    • http://viguwuvip.fusedfinery.com/uploads/1/3/0/7/130775918/xorigopasa.pdf
    • http://files.stocktonelectricianpros.com/uploads/1/3/1/0/131070762/2ad59789.pdf
    • http://files.revivalmission.info/uploads/1/3/1/6/131637853/parogowuguliw.pdf
    • http://files.marybuchinger.com/uploads/1/3/1/0/131071252/ganisujafixu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0537/0791/files/28086074336.pdf
    • https://cdn.shopify.com/s/files/1/0429/8267/0485/files/asthma_action_plan_texas.pdf
    • https://cdn.shopify.com/s/files/1/0429/3237/1622/files/jekivipumevabivomimilino.pdf
    • https://cdn.shopify.com/s/files/1/0437/3177/9745/files/pdf_skf_bearing_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/metegemekipezafekude.pdf
    • https://cdn.shopify.com/s/files/1/0438/5390/6080/files/renifewevi.pdf
    • https://cdn.shopify.com/s/files/1/0437/1772/2280/files/xufurowizege.pdf
    • https://cdn.shopify.com/s/files/1/0431/9277/8901/files/79030581629.pdf
    • https://cdn.shopify.com/s/files/1/0431/3959/6454/files/jemiketuradinevi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4975/3507/files/55092464889.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/83478774752.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_off0000650c.bin
5414368f163fd074a1708e56463ad1dc1b1f2274595006ce0179bb9831255d93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x650C 5248 bytes
font_01_sfnt_off000076c1.bin
a1134048af21e667fcc4f8790a7e2f6184589b1a46ea6aefcf61e82151a119c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76C1 10624 bytes
font_02_sfnt_off00009b1c.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B1C 4324 bytes

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