Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3eec8235efd9e7f…

MALICIOUS

PDF

32.2 KB Created: 2020-09-14 10:48:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d52b71a57938a070e14c5f53160ea3b4 SHA-1: f95a2a7b514c3cbaaff9168d1028a1254ef0ae08 SHA-256: b3eec8235efd9e7ffd87c362ce3e5790408e73313c6e4d645d0bbb2283f2cedb
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector link to 'https://ttraff.club/pify?keyword=gba+rom+pro+apk'. Another critical heuristic identified a PDF link farm, suggesting SEO poisoning or spam distribution. The document body, though heavily obfuscated, contains strings that appear to be URLs and metadata related to PDF generation, reinforcing the malicious link-based attack pattern. The primary intent appears to be redirecting users to malicious infrastructure.

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=gba+rom+pro+apk
    • http://relovan.cameronhorn.com/uploads/1/3/1/4/131437087/6cfdc744.pdf
    • http://jabode.nikkibrowndesigns.com/uploads/1/3/1/3/131383721/kulufazad.pdf
    • http://files.annechaseartwork.com/uploads/1/3/1/8/131856636/c3a433dabc.pdf
    • http://files.alialghaithi.com/uploads/1/3/1/3/131383045/02e32970e2d.pdf
    • http://files.lifethoughtspublishing.com/uploads/1/3/0/8/130813427/lemil_vurevuf_zikexibufo.pdf
    • https://static.usrfiles.com/ugd/a31856_1aedd0517f714a359096a9a16f44b71c.pdf
    • https://static.usrfiles.com/ugd/ced2dc_d231b0d4612a4cf8b0c4fb9a5bd6cde0.pdf
    • https://static.usrfiles.com/ugd/a3b54b_3514c70238904ef49fb75b64daed8896.pdf
    • https://static.usrfiles.com/ugd/ac72e0_cb3460f3cc8147d38d2aa2d69c4dcab5.pdf
    • https://cdn.shopify.com/s/files/1/0433/8502/8757/files/67933371652.pdf
    • https://cdn.shopify.com/s/files/1/0436/4979/4213/files/51804136177.pdf
    • https://cdn.shopify.com/s/files/1/0441/1555/8552/files/kosegefoza.pdf
    • https://cdn.shopify.com/s/files/1/0438/9571/8040/files/ielts_writing_tips_and_techniques.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_off00004304.bin
57e266e2e36ecc361fe2157b828585622cc54ac6d818fa3874e32bb58d4cd9c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x4304 4992 bytes
font_01_sfnt_off000053e8.bin
597efbed3902c7be17257c136db17ee1ae5d4efab28404aa6ec51f1fade69855
pdf-font-stream PDF embedded font (sfnt) at offset 0x53E8 9600 bytes