Malicious PDF — malware analysis report

Static analysis result for SHA-256 aebed2c9dc1ba70c…

MALICIOUS

PDF

45.5 KB Created: 2020-07-31 14:17:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b334362af7816bb7f14ab212d4bf0e1 SHA-1: 2f1e5669a1ffcf0404c2d494af6524af6a4018b1 SHA-256: aebed2c9dc1ba70c1cac77376a09f4d01385da349e0ff8b2d86568843f35a94c
154 Risk Score

Malware Insights

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

The PDF contains a link farm with 30 external PDF links, many hosted on Shopify, designed to appear as legitimate search engine results. One of the primary links redirects to a known malicious infrastructure at 'ttraff.cc'. The ML classifier strongly indicates maliciousness. No scripts were extracted from this sample.

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=probability+density+function+pdf
    • http://files.jackyuhuazhou.com/uploads/1/3/0/7/130776006/linepatexa-degudetunej-bapunamifupakur-wovelimiri.pdf
    • http://files.julijanahajdinjak.com/uploads/1/3/1/4/131453268/3622891.pdf
    • http://files.dawghouses.net/uploads/1/3/0/8/130813582/61a14c2027.pdf
    • http://files.colleenshaunawaters.com/uploads/1/3/0/7/130739595/49f281c2.pdf
    • http://files.advanceprolighting.com/uploads/1/3/1/3/131383760/kevofuj.pdf
    • http://files.colleenshaunawat
    • https://cdn.shopify.com/s/files/1/0440/6122/9206/files/fukibixutizewojig.pdf
    • https://cdn.shopify.com/s/files/1/0428/8079/4780/files/zudasepidedix.pdf
    • https://cdn.shopify.com/s/files/1/0433/8624/1187/files/garijugotebugu.pdf
    • https://cdn.shopify.com/s/files/1/0427/9749/8535/files/keturapavexureritexobudes.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/womonevixaxijebuvi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sosivizugepu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zaduvezumutup.pdf
    • https://cdn.shopify.com/s/files/1/0430/9050/9977/files/71300370147.pdf
    • https://cdn.shopify.com/s/files/1/0427/6820/3942/files/jarodoxe.pdf
    • https://cdn.shopify.com/s/files/1/0437/1464/2069/files/zirivesiwegokajigisoxopor.pdf
    • https://cdn.shopify.com/s/files/1/0433/5819/1768/files/kejajakomipomafoniku.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_off000074b3.bin
997d5cb2fc41240d077244e70e941df552ef43b516bba42fae804a0d3e6f0ece
pdf-font-stream PDF embedded font (sfnt) at offset 0x74B3 5272 bytes
font_01_sfnt_off000086a5.bin
cd046201d866456dc1b89750b68b0e0e329e18895b111238d1aaee7d39a2a008
pdf-font-stream PDF embedded font (sfnt) at offset 0x86A5 9976 bytes