Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ac69ec5364e85b9…

MALICIOUS

PDF

40.2 KB Created: 2020-08-21 05:06:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2d7d46c40730fcc144725d02952537e SHA-1: 4d86375a18ed6e29ecaed6b37acf83f4e06e2532 SHA-256: 5ac69ec5364e85b9926ab34f6f78d807b20779c7fc866b0c082069e513b85a3d
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 'https://ttraff.cc/pify?keyword=tamilrockers.+com+movies++2018+tamil'. This indicates an attempt to direct the user to a malicious site, likely for phishing or malware distribution. The presence of a large number of external PDF links, many hosted on Shopify, further suggests a link farm or SEO manipulation tactic to obscure the malicious intent. 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.cc/pify?keyword=tamilrockers.+com+movies++2018+tamil
    • http://xatisel.muzzlemagazine.com/uploads/1/3/2/8/132815002/2106523.pdf
    • http://kelutu.kanthimathi.org/uploads/1/3/0/8/130813612/notupip-gexulawela-komejisak.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9299/1399/files/lozozavunivix.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/24375498268.pdf
    • https://cdn.shopify.com/s/files/1/0432/6978/3720/files/50646978906.pdf
    • https://cdn.shopify.com/s/files/1/0428/0143/0695/files/zevopuworit.pdf
    • https://cdn.shopify.com/s/files/1/0438/4410/8445/files/causatives_get_have_and_make_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0439/7786/7422/files/24439990207.pdf
    • https://cdn.shopify.com/s/files/1/0430/6193/6290/files/anemia_normocitica_normocromica_en_nios.pdf
    • https://cdn.shopify.com/s/files/1/0439/9045/0334/files/31975102907.pdf
    • https://cdn.shopify.com/s/files/1/0428/5199/1719/files/logefamilegewak.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053ca.bin
4fdc4c9e698ea0485f25f4bb7632019669a7b58c679e2da2480d0c3383626483
pdf-font-stream PDF embedded font (sfnt) at offset 0x53CA 5568 bytes
font_01_sfnt_off000066aa.bin
73983ccd477f0e4c07634362c0f9f13a23cea415a26bff37f7f125d59a681190
pdf-font-stream PDF embedded font (sfnt) at offset 0x66AA 1936 bytes
font_02_sfnt_off00006fed.bin
b4551130f2f93b140ea510b0d327ae3ee2d9573f7dc678bbc5efa0603daedf1a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FED 10636 bytes