Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f65741476d666e6…

MALICIOUS

PDF

41.6 KB Created: 2020-09-05 20:40:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c5dc9925cf348fa0b7a8f7b5dec3166b SHA-1: 6cf74d63259b7043f1f9eae5894302ab83840645 SHA-256: 6f65741476d666e6d707215af67a660d6773dc44c3927c17a782eb8fcd6954a1
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.club/wix?keyword=clear+anodized+aluminum+sheet+metal In 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/1/0434/7094/6456/files/answer_me_jesus_toy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1614/2497/files/nimodoget.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8131/8056/files/84454743113.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2107/2546/files/effects_of_tramadol_abuse_in_ghana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/1102/3519/files/mass_effect_2_dlc_authorization_crac.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/850f07_07c8313001274c4a90acffa2f88c7412.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7a359d_3f90187b26e944469e2d16e93bc28c9a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1df9ea_095beb8234e74b7c8bd8fffac9a6013c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_69b21ff665ae4c409e69a998991bc73a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e3834b_41cbcf796610412dbf8a2b76d8f37435.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/making_inferences_worksheet_for_grade_7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2418/7549/files/58670646648.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1619/0112/files/47220052213.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_1ac3c43eabc7466497d2b29eb1063d4c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/04e6f9_c5d3767f99b84489a78fc5a364bcc2d9.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/764aaa_85a0fbea69cc4794ab1b1a4e3e9bd51b.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_off0000632a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x632A 5020 bytes
SHA-256: 85b09ef8fe6888a5e5eb36b0dc437dccd9665f7a34ad1ac7fa61216b8e0bc4f9
font_01_sfnt_off00007410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7410 10972 bytes
SHA-256: edd945237f1a987e3b7fe911a088368f4e6e9084277e61864fee1a0a6430f6f8

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