Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d453529a1193878…

MALICIOUS

PDF

48.3 KB Created: 2020-08-06 20:43:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 910d3daae96e0774a38d19400a5d67e1 SHA-1: 33a626d049793ec94ea3de6c9b16fecbab34a969 SHA-256: 5d453529a1193878e67e738af375f09c1c07b7778e353ec26fdb4f9bec0f98fe
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector (ttraff.cc) that is presented as a 'keto intermittent fasting meal plan pdf'. This redirector likely leads to a further malicious download or phishing page. The PDF also contains many other links to external PDFs, suggesting a link farm or SEO poisoning tactic to improve search engine ranking for malicious content. No scripts were extracted, but the presence of malicious links and the document body's deceptive content strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=keto+intermittent+fasting+meal+plan+pdf
    • http://files.medicinalrootsmagazine.com/uploads/1/3/2/6/132695339/726c76.pdf
    • http://files.chanabarriger.com/uploads/1/3/1/4/131413905/pafadanububovu.pdf
    • http://files.jubileefarmstand.com/uploads/1/3/0/7/130739232/e9a35ca46da.pdf
    • http://fejejab.kentuckysocietyforrespiratorycare.org/uploads/1/3/1/4/131437601/najotarivenijoxi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/juvituxibera.pdf
    • https://cdn.shopify.com/s/files/1/0438/2693/8018/files/jumbled_words_exercises_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/bimuponanakazel.pdf
    • https://cdn.shopify.com/s/files/1/0428/0185/6668/files/r_repeated_measures_anova.pdf
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/problem_solving_skills_assessment_questionnaire.pdf
    • https://cdn.shopify.com/s/files/1/0430/9159/1321/files/54756931097.pdf
    • https://cdn.shopify.com/s/files/1/0430/1789/6089/files/sanunubixovoronixeviko.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/50315957699.pdf
    • https://cdn.shopify.com/s/files/1/0436/4071/7462/files/76193265403.pdf
    • https://cdn.shopify.com/s/files/1/0440/4012/6614/files/9024538629.pdf
    • https://cdn.shopify.com/s/files/1/0428/0408/4899/files/28872910585.pdf
    • https://cdn.shopify.com/s/files/1/0432/7918/8118/files/gojokon.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_off00007e7d.bin
c5a57b0bfa7548e48adf69486cdc311211357144292b0f8acf238ddc05275f13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E7D 5328 bytes
font_01_sfnt_off0000908d.bin
515def0b8c173f2a4db2f16ae68c60d95197a8f6624f3d78fd9857f38acc173a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x908D 10236 bytes

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