Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f43f30ca5e0ecda…

MALICIOUS

PDF

36.1 KB Created: 2020-09-07 15:46:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7fa6a2c60ee33a83ccdeccf02372c1c1 SHA-1: c9866cfd019bd3042ec9a0accdc5486f20e83f9b SHA-256: 6f43f30ca5e0ecda024b35a0e31581ee7924b8dabcbd6b5c249570ae48a8b015
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The embedded document body, though heavily obfuscated, contains text related to 'whatsapp wedding invitation editable templates' and a URL that likely serves as the initial lure. This suggests a phishing attempt designed to redirect users to malicious content.

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.link/wix?keyword=whatsapp+wedding+invitation+editable+templates
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/50036278562.pdf
    • https://cdn.shopify.com/s/files/1/0429/7188/9815/files/conductors_and_insulators_worksheet_5th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0436/6866/8569/files/xiresezaveninozosazi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7002/9975/files/sugibixazuzin.pdf
    • https://static.usrfiles.com/ugd/b8c837_a0c3cb85d60d483fbed9a920a1dc5fa8.pdf
    • https://cdn.shopify.com/s/files/1/0434/6426/1797/files/davis_drug_guide_app_login.pdf
    • https://cdn.shopify.com/s/files/1/0468/1518/3002/files/archery_king_hack_version_apk.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7349/files/borarawigapemu.pdf
    • https://cdn.shopify.com/s/files/1/0429/4616/6943/files/neoplasia_chapter.pdf
    • https://cdn.shopify.com/s/files/1/0438/3378/6518/files/wivuwisipumuwanifaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/7709/8915/files/15837210681.pdf
    • https://cdn.shopify.com/s/files/1/0434/0721/2694/files/union_and_intersection_of_sets_worksheet_kuta.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_off00004f60.bin
63bcd7bc7bc3f0934659ffaeddcd6aea9d939d9b08a6514509760e06ef75daca
pdf-font-stream PDF embedded font (sfnt) at offset 0x4F60 5580 bytes
font_01_sfnt_off00006251.bin
21d9298f24a8ea54465fe5939fd73cbdd168d57492eedea7b7a72d9aa288c239
pdf-font-stream PDF embedded font (sfnt) at offset 0x6251 9656 bytes