Malicious PDF — malware analysis report

Static analysis result for SHA-256 30154af164cd1d96…

MALICIOUS

PDF

36.1 KB Created: 2020-08-24 09:10:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec143c49de2c6378d3af75355d459393 SHA-1: cf3adcf94d175ece21ba24f2e3f560e812f5eab6 SHA-256: 30154af164cd1d96da1151f813ba67a04846380e077e39d4d0894608716594df
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external link farm, with a primary malicious redirector URL identified as https://ttraff.ru/pify?keyword=chandra+chakori+full+movie+kannada. The document body, though heavily obfuscated, contains text related to a movie title, likely serving as a lure. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous embedded links to external resources supports a phishing or malware distribution attack pattern.

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=chandra+chakori+full+movie+kannada
    • http://files.neilfaulkner.co.uk/uploads/1/3/1/0/131071145/acfa7b4.pdf
    • http://files.holcombpta.com/uploads/1/3/1/6/131606687/989e51cc105f74.pdf
    • https://cdn.shopify.com/s/files/1/0432/6978/3720/files/59607308210.pdf
    • https://cdn.shopify.com/s/files/1/0435/8032/6051/files/business_english_grammar_test_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/7632/1434/files/administrao_pblica_para_concursos.pdf
    • https://cdn.shopify.com/s/files/1/0434/0636/0725/files/vidakeminesiberuse.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/9478347051.pdf
    • https://cdn.shopify.com/s/files/1/0433/7850/7934/files/bizomubujaxegivevazuban.pdf
    • https://cdn.shopify.com/s/files/1/0433/8457/0019/files/kannada_english_dictionary_app.pdf
    • https://cdn.shopify.com/s/files/1/0434/1006/3527/files/class_11_chemistry_chemical_bonding_and_molecular_structure_notes.pdf
    • https://cdn.shopify.com/s/files/1/0461/0224/9636/files/mandatory_reporting_wa_schools.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000055c6.bin
87d0fe0e8f100e4c207515e7021d5273d73a3a8e4d7dfefac98970e9a847f63d
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x55C6 2868 bytes
font_00_sfnt_off0000448f.bin
69ee7ef45e94e35fca66c33af2bac510b9e2f7a78defdf5021e8dc70e3a0b0e2
pdf-font-stream PDF embedded font (sfnt) at offset 0x448F 5112 bytes
font_02_sfnt_off00006249.bin
f5c4d3d2302ccb8469d78adeff381fbe1391d725504b5191799cb03b6d02f694
pdf-font-stream PDF embedded font (sfnt) at offset 0x6249 9632 bytes