Malicious PDF — malware analysis report

Static analysis result for SHA-256 01906ddd4749aa14…

MALICIOUS

PDF

44.1 KB Created: 2020-08-10 02:53:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b83b0dee96ba74f77acf6e62b3d47784 SHA-1: f70bf3b38b5c8656697627b5e316f6bf2191af87 SHA-256: 01906ddd4749aa14687c69071103d192ac0e609e2acf6b1da31b5b5dcde8ff90
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=bible+history+timeline+chart+pdf', suggesting a lure to a malicious site. The presence of a large number of external PDF links, many hosted on Shopify, further supports the SEO link farm tactic.

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.ru/pify?keyword=bible+history+timeline+chart+pdf
    • http://files.aspiringvirtuouswomen.com/uploads/1/3/0/9/130969960/wegifupim.pdf
    • http://files.letstalkfoundation.org/uploads/1/3/1/8/131856310/183032.pdf
    • http://files.a1moments.com.au/uploads/1/3/1/4/131407148/f1cb1e3ca65cf3.pdf
    • http://rigipa.onemindspiritualservices.com/uploads/1/3/0/8/130873804/nosoropiwumu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/8922/2045/files/34028754200.pdf
    • https://cdn.shopify.com/s/files/1/0432/6916/1110/files/85579370887.pdf
    • https://cdn.shopify.com/s/files/1/0430/5246/6325/files/13810063147.pdf
    • https://cdn.shopify.com/s/files/1/0433/1054/7099/files/ejercicios_con_numeros_primos_y_compuestos.pdf
    • https://cdn.shopify.com/s/files/1/0430/7252/0352/files/kixekoxadumusokatobi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4130/8320/files/antonyms_and_synonyms_list_with_telugu_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0428/9354/1532/files/jabezadiledumaguzizes.pdf
    • https://cdn.shopify.com/s/files/1/0433/5622/5686/files/xibagadab.pdf
    • https://cdn.shopify.com/s/files/1/0433/8771/5742/files/54965140058.pdf
    • https://cdn.shopify.com/s/files/1/0434/3175/5932/files/gefunabukej.pdf
    • https://cdn.shopify.com/s/files/1/0435/4618/1787/files/7975943781.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_off0000634f.bin
c24767e283aac419edfbd300f024a4731c24a60c2e984f2a337c45c3db011780
pdf-font-stream PDF embedded font (sfnt) at offset 0x634F 5688 bytes
font_01_sfnt_off00007687.bin
540b53d38e7bd6fdcfa69a04545f103636b32a4068f0231cae67a620b0944d81
pdf-font-stream PDF embedded font (sfnt) at offset 0x7687 14500 bytes