Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce7999eb88bb9b4b…

MALICIOUS

PDF

35.8 KB Created: 2020-08-06 10:44:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d23f8299fdd6eb68892cc40782a278b SHA-1: dcfcf0f44a753b97bbcef3cd9cada89643db1c08 SHA-256: ce7999eb88bb9b4bd6cc284b9a8fb63474677e465dad16136bf473a4d1a6d45b
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and references a book title, suggesting a lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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.com/pify?keyword=bodenheimer+and+grumbach+7th+edition+pdf
    • http://files.heartwoodpath.com/uploads/1/3/1/6/131606060/cee6f643.pdf
    • http://files.johnychang.com/uploads/1/3/2/7/132712005/vinedamobedig-pukowipiben-zukulemadamilo-zerivefefag.pdf
    • http://sitix.lifetabernaclesc.com/uploads/1/3/0/9/130969204/fileb.pdf
    • https://cdn.shopify.com/s/files/1/0429/1438/1980/files/52268263173.pdf
    • https://cdn.shopify.com/s/files/1/0431/7983/5547/files/pomupegogizej.pdf
    • https://cdn.shopify.com/s/files/1/0438/2484/0861/files/property_manager_resume.pdf
    • https://cdn.shopify.com/s/files/1/0430/7845/1351/files/nedaf.pdf
    • https://cdn.shopify.com/s/files/1/0435/9146/7176/files/baofeng_bf_888s_manual_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0436/4291/2926/files/10760507803.pdf
    • https://cdn.shopify.com/s/files/1/0429/8607/8369/files/68559663027.pdf
    • https://cdn.shopify.com/s/files/1/0432/0867/1394/files/79982190554.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30036161276.pdf
    • https://cdn.shopify.com/s/files/1/0431/5476/8021/files/nunupotegomabam.pdf
    • https://cdn.shopify.com/s/files/1/0438/1153/7053/files/kifowikuzenipazifov.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_off00004d44.bin
08b6539a44b9065d660ebeef7af5a0175a054acbc4df324f57c6203e5d1aa9df
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D44 5628 bytes
font_01_sfnt_off00006049.bin
0cbbaeaef9565e7ea8a6a8aded76b67a2e7416cab45e37c894305d6b98b7cb51
pdf-font-stream PDF embedded font (sfnt) at offset 0x6049 10024 bytes