Malicious PDF — malware analysis report

Static analysis result for SHA-256 5933bc4db73185b6…

MALICIOUS

PDF

73.9 KB Created: 2020-08-11 02:30:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2629edcc004988c06bd7d3dbd96796a SHA-1: a36ca8e59b565b10e1694b9534215eaf63d6b482 SHA-256: 5933bc4db73185b67be15fa6f214c790ad8f882637f5a7bea1ead6a40431bd08
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to manipulate search engine results for the term 'palmistry tamil pdf free download'.

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=palmistry+tamil+pdf+free+download
    • http://files.sound-properties.com/uploads/1/3/1/3/131379035/8081391.pdf
    • http://files.thecococouture.com/uploads/1/3/1/3/131398449/2bc2d5b.pdf
    • http://files.affordablestoragemidland.com/uploads/1/3/1/1/131164295/7941942.pdf
    • http://files.alamohhcandh.org/uploads/1/3/1/1/131164476/nuxilomevitu.pdf
    • http://files.wendyscountrymarket.com/uploads/1/3/0/7/130740053/7f46bfe9b3304.pdf
    • https://cdn.shopify.com/s/files/1/0430/5331/8306/files/tepevesupoda.pdf
    • https://cdn.shopify.com/s/files/1/0436/2724/9826/files/xosodusitapofujo.pdf
    • https://cdn.shopify.com/s/files/1/0436/0352/5794/files/ruvobabusorexefokaxima.pdf
    • https://cdn.shopify.com/s/files/1/0437/2326/0058/files/82218234579.pdf
    • https://cdn.shopify.com/s/files/1/0434/8336/5528/files/9558477660.pdf
    • https://cdn.shopify.com/s/files/1/0430/2051/7537/files/42347316420.pdf
    • https://cdn.shopify.com/s/files/1/0428/1804/4063/files/tepomugelenenuzumux.pdf
    • https://cdn.shopify.com/s/files/1/0433/2630/8510/files/90099374799.pdf
    • https://cdn.shopify.com/s/files/1/0452/5555/7280/files/7256308299.pdf
    • https://cdn.shopify.com/s/files/1/0435/8048/9891/files/firuwojidib.pdf
    • https://cdn.shopify.com/s/files/1/0430/4309/4677/files/48310205415.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41841620016.pdf
    • https://cdn.shopify.com/s/files/1/0434/0885/1098/files/78198828025.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_off0000dbb5.bin
b11fbd54988afb3c3821bc9c0048873033915cdbcbe3d4a183adb700748c5d83
pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB5 5384 bytes
font_01_sfnt_off0000ee02.bin
28078d9552c0d19d87178edc0fa0c557ebace363548aa79a6f4be7a27cf51eea
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE02 14052 bytes