Malicious PDF — malware analysis report

Static analysis result for SHA-256 d75d48cf41b55317…

MALICIOUS

PDF

45.9 KB Created: 2020-08-29 21:48:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb896e4ed0dd917036f7580e108211bf SHA-1: 46bebc6cd855b9423dfe8c770e2916593d509b2a SHA-256: d75d48cf41b55317a782afb5318966d6492dae5c329305b90282d0610f6a9886
154 Risk Score

Malware Insights

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

The PDF file was flagged as malicious due to the presence of a link to a known malicious redirector, ttraff.cc. This heuristic, combined with the ML classifier's high confidence score, indicates a likely phishing or malware distribution attempt. The document body contains the same malicious URL, reinforcing its role as a lure. No scripts were extracted, and the document body itself is heavily obfuscated, but the primary malicious indicator is the embedded URL.

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/wix?keyword=manideepa+varnana+in+telugu+lyrics
    • https://static.usrfiles.com/ugd/b8c837_7d907472fcd54df29e0c118fb13c0739.pdf
    • https://static.usrfiles.com/ugd/b8c837_06be2f7c8e9b444bb602d682ebe931fd.pdf
    • https://static.usrfiles.com/ugd/bb13a2_2a1e61d9dd6a4fae8412f5a087fa856f.pdf
    • https://static.usrfiles.com/ugd/b8c837_3cba043c14bd4ee79519e9e6063bc1b0.pdf
    • https://static.usrfiles.com/ugd/b8c837_85ca022e453d45e4ac8ec682d778d4e4.pdf
    • https://cdn.shopify.com/s/files/1/0435/2009/8472/files/kelozamekekekogobujalawix.pdf
    • https://cdn.shopify.com/s/files/1/0450/0806/0574/files/jenutez.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/38216708165.pdf
    • https://cdn.shopify.com/s/files/1/0439/4654/1211/files/barking_up_the_wrong_tree_by_eric_barker.pdf
    • https://cdn.shopify.com/s/files/1/0432/4225/8587/files/allergy_definition.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/birizakidunupujudexi.pdf
    • https://static.usrfiles.com/ugd/b8c837_9dc65c5c217b4b1d82ebcacc3d46d1ce.pdf
    • https://static.usrfiles.com/ugd/238140_fb5d8fb4039b4f65993e0cc81c595018.pdf
    • https://static.usrfiles.com/ugd/409ca8_9dee0467316a438d8ebef2bcd9b0a731.pdf
    • https://static.usrfiles.com/ugd/b8c837_8a7b79ad55304ee581f461abd5d717e1.pdf
    • https://static.usrfiles.com/ugd/0c268c_572a44ba0f6d464c8e455835dc177327.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_off00006c2f.bin
bddb736a5bbd63ebfe53950c90662fa096a1ebc028406cc69558433d22bd974c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C2F 5408 bytes
font_01_sfnt_off00007eaa.bin
158b9eb2ae917636a164b082c13c3dd021d954409c9ab1fb71e35a41ba1b7dd7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EAA 13092 bytes