Malicious PDF — malware analysis report

Static analysis result for SHA-256 093793f7bbada77a…

MALICIOUS

PDF

55.8 KB Created: 2020-08-08 01:40:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 741591017c9d902a9c4309263e16be97 SHA-1: f4eb312981f9a3c859369698003ae3a0412089d4 SHA-256: 093793f7bbada77a4ff94cc3f464f3299d70f99444a15b7dd641c753d2f351a6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination of the malicious content. The document also contains a large number of links to other PDFs, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicated maliciousness, and the overall structure points to a phishing or redirection attempt.

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=spiritual+gifts+of+the+holy+spirit+pdf
    • http://gudaliki.acsofmichigan.com/uploads/1/3/0/8/130814397/5999364.pdf
    • http://files.deanalegassick.com/uploads/1/3/1/8/131856283/zigefasev-bexipilusolidu-nusiwabo-defoxitub.pdf
    • http://faminan.whitewillowcollective.com/uploads/1/3/1/3/131379732/3095746.pdf
    • http://files.cmjwny.org/uploads/1/3/0/7/130775251/7391483.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/0212/6751/files/yamaha_rx-_v675_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/0512/4516/files/jarusukefarodulip.pdf
    • https://cdn.shopify.com/s/files/1/0429/5157/3657/files/chomsky_universal_grammar.pdf
    • https://cdn.shopify.com/s/files/1/0429/4079/2999/files/vimirego.pdf
    • https://cdn.shopify.com/s/files/1/0434/3431/1845/files/78182498851.pdf
    • https://cdn.shopify.com/s/files/1/0448/5827/8050/files/area_model_multiplication_worksheets_5th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0430/4932/0610/files/git_using_proxy.pdf
    • https://cdn.shopify.com/s/files/1/0431/9599/0175/files/91956474158.pdf
    • https://cdn.shopify.com/s/files/1/0433/3531/9711/files/kedasegidasemeruke.pdf
    • https://cdn.shopify.com/s/files/1/0435/8701/0728/files/i_shot_myself.pdf
    • https://cdn.shopify.com/s/files/1/0429/1470/9670/files/88492232691.pdf
    • https://cdn.shopify.com/s/files/1/0431/5847/0807/files/low_carb_keto_food_list.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_off00009cba.bin
3953ce598197ef5aaac425ce036413d19e7244c6a3364cc82da6b760656d89bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CBA 5508 bytes
font_01_sfnt_off0000af71.bin
939a84687652436db9d4fafeea98083ebde9f536b8f8ec92f09f0a58517f5942		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF71 10020 bytes

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