Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bd4727fb84be6c8…

MALICIOUS

PDF

66.6 KB Created: 2020-08-10 23:57:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e3e527aa8fea7da5a0845e01f5bc0e75 SHA-1: 27bc026c309ed495dd46eac5110fc57b0063fa65 SHA-256: 0bd4727fb84be6c8132be4fb2834c9ab14438afe389300de698232f962b1b9ab
194 Risk Score

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=journal+of+flood+risk+management+pdf In PDF document text
    • http://files.partyhousesupplies.com/uploads/1/3/0/7/130738771/6203143.pdfIn PDF document text
    • http://files.ourladyofperpetualhelpparish.com/uploads/1/3/1/4/131438392/xejosujawew-xofeko-texitujogupi-jegekejav.pdfIn PDF document text
    • http://files.ccsdscience.com/uploads/1/3/0/8/130814120/defulis.pdfIn PDF document text
    • http://mefiwife.bsatroop492-rentonwa.com/uploads/1/3/0/8/130814328/xebufiduxukubu_rufoba_fidedo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/dojozowas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0766/2504/files/sagevu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3846/6467/files/88257523654.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4852/5208/files/magixutepodojufinon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4207/8877/files/fonubuxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6802/3194/files/85743995093.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7078/3645/files/72677655847.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2629/2629/files/california_life_science_7th_grade_textbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8494/8380/files/35678894788.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7027/3174/files/bobcat_s450_specs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9341/7366/files/gakowevan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3492/7513/files/blancanieves_cuento_en_ingles.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6FB 5416 bytes
SHA-256: 3236b1fc21266a9e79763584259d6e7dfbc948b4769d8317e7bf5996771c2812
font_01_sfnt_off0000d955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD955 10452 bytes
SHA-256: 83ee9e429f49f9127d6447cd7dd2857941fe7dd2e3eae0e596dc9f94157edb4f

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