Malicious PDF — malware analysis report

Static analysis result for SHA-256 19c8527777116c13…

MALICIOUS

PDF

41.9 KB Created: 2020-08-22 17:43:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db92549b090ef1281969e82ebca80f1e SHA-1: 06669b1352b0653b84dbacfe5e88f26b33c65d12 SHA-256: 19c8527777116c13aaaf37192f1a1abb865d4727dc46163533af4c07cd2e9afe
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a movie download, which is a common lure for phishing or malware delivery. The ML classifier strongly indicated maliciousness, and the PDF structure reveals a mass of external links, many hosted on Shopify, likely part of a link farm to obscure the final malicious destination. The primary malicious URL identified is https://ttraff.cc/pify?keyword=anaconda+4+full+movie.

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=anaconda+4+full+movie
    • http://files.romanzapata.com/uploads/1/3/1/6/131637218/godapof.pdf
    • http://files.edfwarbirds.com/uploads/1/3/0/7/130739227/jabezab.pdf
    • https://cdn.shopify.com/s/files/1/0430/7841/8583/files/19718996915.pdf
    • https://cdn.shopify.com/s/files/1/0428/7974/6201/files/99797158414.pdf
    • https://cdn.shopify.com/s/files/1/0436/0149/4179/files/catio_spaces.pdf
    • https://cdn.shopify.com/s/files/1/0437/6179/5230/files/annus_mirabilis.pdf
    • https://cdn.shopify.com/s/files/1/0431/2409/7191/files/wapegavofajugala.pdf
    • https://cdn.shopify.com/s/files/1/0430/8307/1650/files/24732153082.pdf
    • https://cdn.shopify.com/s/files/1/0428/1712/6567/files/pajedimiparojupisozutupir.pdf
    • https://cdn.shopify.com/s/files/1/0434/5180/9957/files/64765831389.pdf
    • https://cdn.shopify.com/s/files/1/0433/7962/2040/files/cancer_research_brand_guidelines_2018.pdf
    • https://cdn.shopify.com/s/files/1/0430/9362/2935/files/31670397276.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
font_00_sfnt_off00005888.bin
8757d1844691185f270a9ae61a8f86d1eb1971b2d3d59d9c6959d737281239cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x5888 4832 bytes
font_01_sfnt_off000068dd.bin
bee59261c9bf8a8ba09d07526c40019fbf7d4a3098246c745b92fd017c617e03
pdf-font-stream PDF embedded font (sfnt) at offset 0x68DD 10536 bytes
font_02_sfnt_off00008cf0.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CF0 4324 bytes