Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd5ce466dae64527…

MALICIOUS

PDF

45.1 KB Created: 2020-08-02 14:05:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14ed802b93d79e66fffbc682eca1d816 SHA-1: 3bbe5a4bcfbc51978c455557288725514bf81bbc SHA-256: dd5ce466dae64527f27e77432d96c4072ce3f0ee3d8296cc739f2b48de27b622
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector pointing to 'https://ttraff.com/pify?keyword=iicrc+s520+pdf+free+download'. The document body, though heavily obfuscated, contains text related to 'iicrc s520 pdf free download', suggesting a lure to entice users to click the malicious link. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to improve search engine visibility for the malicious content.

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=iicrc+s520+pdf+free+download
    • http://files.stifftstationgifts.com/uploads/1/3/2/3/132302928/megesotagukopo-wezikagonakok-figona-rixovapumuret.pdf
    • http://bedabi.believenufitness.com/uploads/1/3/1/0/131071157/fapazaxur-wabujuvi.pdf
    • http://files.spjgt.com/uploads/1/3/1/4/131438055/8338106.pdf
    • http://files.britttanya.com/uploads/1/3/1/4/131437834/2a96d7c0d4636.pdf
    • http://files.crsurfzone.com/uploads/1/3/1/3/131383602/kominizufeb_rowamoreje.pdf
    • https://cdn.shopify.com/s/files/1/0437/4613/2129/files/tamononiwi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0323/9840/files/minimalismo_livro.pdf
    • https://cdn.shopify.com/s/files/1/0429/1526/6713/files/3835864190.pdf
    • https://cdn.shopify.com/s/files/1/0429/2005/0855/files/tezanat.pdf
    • https://cdn.shopify.com/s/files/1/0427/8750/4294/files/11601406102.pdf
    • https://cdn.shopify.com/s/files/1/0431/0564/8807/files/63605293640.pdf
    • https://cdn.shopify.com/s/files/1/0436/2862/6080/files/milomi.pdf
    • https://cdn.shopify.com/s/files/1/0437/2103/1832/files/nowok.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/miveguxuxububepevomozit.pdf
    • https://cdn.shopify.com/s/files/1/0428/1267/0111/files/kayla_itsines_diet.pdf
    • https://cdn.shopify.com/s/files/1/0437/8856/6677/files/aam_registration_notifier.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/parisibudipaxetiwori.pdf
    • https://cdn.shopify.com/s/files/1/0429/4829/6863/files/gepuxudud.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_off00007016.bin
48c9fd3ee581e155b8a26f64d9e7baccf620db0bda9f4c2ecf60ef0ff8959e61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7016 5576 bytes
font_01_sfnt_off00008341.bin
d0bac2a4e38e0204d96b36c3745e379f6c5896cd28dccb9224fed372d6c159b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8341 10492 bytes

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