Malicious PDF — malware analysis report

Static analysis result for SHA-256 2181164400be8117…

MALICIOUS

PDF

46.6 KB Created: 2020-07-30 02:38:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1bc83cd45a96bc5e8a8c906c897db4b5 SHA-1: e6096e915b99025c5cad0c7ff9d06af7e7fc64ec SHA-256: 2181164400be8117137bb930d4f029061f5d4fd7071e4d9c59610fb17a839c13
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The primary malicious URL identified is `https://ttraff.cc/pify?keyword=intro+to+logic+copi+pdf`. The document body is heavily obfuscated, preventing analysis of its specific content, but the presence of numerous external links strongly suggests a phishing or malware distribution attempt.

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=intro+to+logic+copi+pdf
    • http://files.medicinalrootsmagazine.com/uploads/1/3/0/7/130740066/vuvife_wozizivoz.pdf
    • http://files.hightstownmethodist.org/uploads/1/3/1/1/131164386/2326117.pdf
    • http://files.12stepstolovingtheself.com/uploads/1/3/2/8/132814097/19102.pdf
    • http://files.katie-alexander.com/uploads/1/3/1/4/131437276/436f92babddf1.pdf
    • https://cdn.shopify.com/s/files/1/0433/2843/8427/files/67616073325.pdf
    • https://cdn.shopify.com/s/files/1/0430/2422/0321/files/jomurepababudos.pdf
    • https://cdn.shopify.com/s/files/1/0433/9502/3013/files/totawurobomikesokopawi.pdf
    • https://cdn.shopify.com/s/files/1/0434/6550/6966/files/15258526196.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7905/files/9172169612.pdf
    • https://cdn.shopify.com/s/files/1/0436/9501/4056/files/lubup.pdf
    • https://cdn.shopify.com/s/files/1/0428/2934/9030/files/70025747070.pdf
    • https://cdn.shopify.com/s/files/1/0432/7941/7504/files/96497097.pdf
    • https://cdn.shopify.com/s/files/1/0434/1743/6312/files/vetogo.pdf
    • https://cdn.shopify.com/s/files/1/0436/4953/2069/files/wubafizoramaruxi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5829/1093/files/47831408319.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8011/files/gepezijiga.pdf
    • https://cdn.shopify.com/s/files/1/0430/8513/6021/files/73766287752.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/
    • https://cdn.shopify.com/s/files/1/0431/8684/7905/files/91721696

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b79.bin
10fc9dc45a3b2a28cce31d8be833964dd492bc016bf0682d7989d35f1f2f657c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B79 4544 bytes
font_01_sfnt_off00008af0.bin
eccccd84c9d3701e3741227b8cf3820e044f4cd234a7059936f22c960cdb6078
pdf-font-stream PDF embedded font (sfnt) at offset 0x8AF0 10300 bytes