Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8e29e0e7b8658a7…

MALICIOUS

PDF

42.2 KB Created: 2020-08-26 05:17:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 384dc756c49d4c181b64b0bcffe994aa SHA-1: 8e6f01b129ee87bf66985c2c10851503e3a94e29 SHA-256: e8e29e0e7b8658a738f5dab49397c86b34962f60c29d405f891faf629956137a
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with a critical heuristic firing for a malicious redirector. The document body, though partially corrupted, includes the URL 'https://ttraff.club/pify?keyword=reading+passages+for+college+student', which is also flagged as a malicious redirector. The presence of a large PDF link farm suggests an attempt to manipulate search engine results or distribute malicious content through seemingly benign links.

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.club/pify?keyword=reading+passages+for+college+student
    • http://dizalex.tfgcco.com/uploads/1/3/0/7/130776366/56dbc9b95d4c2.pdf
    • http://vadek.kimtarrestaurant.com/uploads/1/3/0/7/130739017/vopot-robogazovunazu.pdf
    • http://guvefap.ndsportschannel.com/uploads/1/3/1/3/131379478/wusogepesifefe-timevijatefa-tilijipozoki-xiwawaxariduki.pdf
    • https://cdn.shopify.com/s/files/1/0427/7927/9527/files/gakubosaka.pdf
    • https://cdn.shopify.com/s/files/1/0428/4488/1059/files/veteguwajexapaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/facebook_audience_network_android_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0428/7922/1927/files/vexutopozapub.pdf
    • https://cdn.shopify.com/s/files/1/0437/5547/1002/files/wuludebavukevavasij.pdf
    • https://cdn.shopify.com/s/files/1/0440/4841/6933/files/ditokolibododawujelepodix.pdf
    • https://cdn.shopify.com/s/files/1/0429/5809/4495/files/1720167268.pdf
    • https://cdn.shopify.com/s/files/1/0435/8589/6609/files/xunipo.pdf
    • https://cdn.shopify.com/s/files/1/0437/1418/3323/files/52950590012.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_off0000676a.bin
4606417756f3eb9d54f4c8352e3d5e8a1351ee3b2f99c76f3bd1b6e100a6fae5
pdf-font-stream PDF embedded font (sfnt) at offset 0x676A 5328 bytes
font_01_sfnt_off0000799b.bin
981882f8749db854ad816af77da82759c6d016990be9504a858e1e7f84524e5b
pdf-font-stream PDF embedded font (sfnt) at offset 0x799B 10120 bytes