Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c1af83df4190bf7…

MALICIOUS

PDF

49.6 KB Created: 2020-08-31 07:39:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3c7ca1efc81d70df440da7ca0f1bf1c SHA-1: 9011824338de79c0175edfee10d9da6eaa22c0dc SHA-256: 1c1af83df4190bf7b5bda6edda2fb2e560d5a22bab6b28147d71c3363d70234f
152 Risk Score

Malware Insights

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

The PDF contains a prominent link to a redirector URL, disguised as a search result for a song download. This link, 'https://ttraff.cc/wix?keyword=o+karam+khudaya+hai+song+download+mp', is flagged as malicious. The document also contains a large number of links to Shopify-hosted PDFs, likely an attempt to manipulate search engine results for SEO poisoning. The ML classifier strongly indicated maliciousness.

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.cc/wix?keyword=o+karam+khudaya+hai+song+download+mp
    • https://cdn.shopify.com/s/files/1/0435/1868/9432/files/mechanics_of_materials_riley.pdf
    • https://cdn.shopify.com/s/files/1/0430/8031/9130/files/addis_ababa_city_administration_housing_agency_condominium_winners_list.pdf
    • https://cdn.shopify.com/s/files/1/0434/5331/7272/files/jolenukugefu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8454/6209/files/46519236196.pdf
    • https://cdn.shopify.com/s/files/1/0432/6978/3720/files/pogalofuk.pdf
    • https://cdn.shopify.com/s/files/1/0429/3427/2159/files/vray_3_for_rhino_crack.pdf
    • https://cdn.shopify.com/s/files/1/0440/6041/0006/files/round_in_python.pdf
    • https://cdn.shopify.com/s/files/1/0434/7078/2614/files/fopasonelubojabenana.pdf
    • https://cdn.shopify.com/s/files/1/0440/2439/7989/files/although_however_despite_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0437/1713/2442/files/rakadotuberoja.pdf
    • https://cdn.shopify.com/s/files/1/0429/7018/5879/files/adjectives_exercises_for_class_8.pdf
    • https://cdn.shopify.com/s/files/1/0436/0686/8126/files/cabana_trial.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f4b.bin
08021767fd6c58fe6a10e0f0dcc9a88db78a990405a0eebad5064c9a00829454
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F4B 5660 bytes
font_01_sfnt_off0000927f.bin
0acc7a494b794aa9e2d26e4323b4556fec8625414fffa430f93b03829c2b814e
pdf-font-stream PDF embedded font (sfnt) at offset 0x927F 12192 bytes