Malicious PDF — malware analysis report

Static analysis result for SHA-256 6245f51aa0c1932c…

MALICIOUS

PDF

110.9 KB Created: 2020-08-26 16:16:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4dc8c9582f4a3bb5f2daf69b3191ffe7 SHA-1: ae8febcdf1da0b3bfeaaf11a01eccf7ce2ef0b30 SHA-256: 6245f51aa0c1932c1f9a2181ebd9cd0f9c0d7272be97edf329f2d9528e261e82
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically the URL https://ttraff.me/pify?keyword=business+communication+process+and+product+7th+edition+pdf. The document body, though heavily obfuscated, contains references to the same keyword, suggesting a lure. The presence of numerous external PDF links, many pointing to potentially compromised or malicious hosting, further supports a link farm or redirection attack pattern. No scripts were extracted, but the primary attack vector appears to be the malicious URL.

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.me/pify?keyword=business+communication+process+and+product+7th+edition+pdf
    • http://joraseva.kyoshocatalogs.com/uploads/1/3/1/6/131606598/a3397.pdf
    • http://rozip.soundslikechris.com/uploads/1/3/2/6/132695569/6363498.pdf
    • http://files.ddrainbow.com/uploads/1/3/2/6/132682124/9023088.pdf
    • http://kagoj.artscollective.co.nz/uploads/1/3/1/6/131606271/barogazuxisaxivoze.pdf
    • http://files.ccdanbury.org/uploads/1/3/1/3/131380008/gerobamalef.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/8462/5558/files/3518933624.pdf
    • https://cdn.shopify.com/s/files/1/0428/2603/9463/files/dulce_maria_loynaz_jardin.pdf
    • https://cdn.shopify.com/s/files/1/0435/7393/6291/files/acres_of_diamond_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/8617/5651/files/present_past_future_tense_words_list.pdf
    • https://cdn.shopify.com/s/files/1/0431/3333/7768/files/bloodstained_ritual_of_the_night_walkthrough.pdf
    • https://cdn.shopify.com/s/files/1/0434/5420/2018/files/reported_speech_backshift.pdf
    • https://cdn.shopify.com/s/files/1/0432/9832/4638/files/guacamelee_super_trophy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/4256/9383/files/41312772279.pdf
    • https://cdn.shopify.com/s/files/1/0430/8048/2967/files/25546838853.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/vejowezidilesidudigeg.pdf
    • https://cdn.shopify.com/s/files/1/0429/2768/5799/files/54043708049.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016ca9.bin
6f9e0b755264771cf8db1eb21fa59f395da4f6799f0cad0d9f5d83fee0058930		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16CA9 5492 bytes
font_01_sfnt_off00017f2b.bin
da2d0d2ce40542541359ae2ecbeac3be6ef9d090ca2a3a0eb936e8f70686e107		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17F2B 14424 bytes

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