Malicious PDF — malware analysis report

Static analysis result for SHA-256 117dc0ef9279e613…

MALICIOUS

PDF

42.3 KB Created: 2020-08-31 12:03:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07d19368c5e6ab93ab5669f71e3129f5 SHA-1: 3a48041736aaa8b9a6a6e044beeb881fe1c4407f SHA-256: 117dc0ef9279e613295f4b1f8649b6731ce5d8d13ebbd5fb2edea5bc4ed3f7d4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is embedded within the document body and is the primary indicator of malicious intent. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO manipulation tactic to obscure the malicious destination. The ML classifier also strongly flagged this PDF as malicious.

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/wix?keyword=quero+uma+dieta+s%25C3%25A3+e+equilibrada+in
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/3436/1508/files/79401296804.pdf
    • https://cdn.shopify.com/s/files/1/0431/8763/4338/files/chemistry_textbook_class_12_ncert.pdf
    • https://cdn.shopify.com/s/files/1/0440/5175/9269/files/usmc_sergeants_course_administration_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/9482/6396/files/long_vowels_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0434/5040/0928/files/zeloxasifopa.pdf
    • https://static.usrfiles.com/ugd/b8c837_9c5f60f4ae5f4bd284098d999c42e049.pdf
    • https://static.usrfiles.com/ugd/ecec20_ccc6ea3b99ef41e885e482c772762bb7.pdf
    • https://static.usrfiles.com/ugd/c83fdb_a1099c0c88ff41f893089bcaf7595e3f.pdf
    • https://cdn.shopify.com/s/files/1/0427/3097/9495/files/88413529076.pdf
    • https://cdn.shopify.com/s/files/1/0430/1094/9273/files/arabic_english_dictionary_of_quranic_usage.pdf
    • https://cdn.shopify.com/s/files/1/0432/3934/2248/files/wewadidevupefasutivokuw.pdf
    • https://cdn.shopify.com/s/files/1/0430/6275/5490/files/85929418839.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_off00006291.bin
0041094ef6471498ac34d1278f31368ce489b0d127808c04c45954d83b174ae9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6291 5616 bytes
font_01_sfnt_off000074eb.bin
483ac31e2e1f6de82b6a80c1bb6bf3c7198142bcffc551dbe1da30908e97eded
pdf-font-stream PDF embedded font (sfnt) at offset 0x74EB 12288 bytes