Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3c0589871922820…

MALICIOUS

PDF

45.2 KB Created: 2020-08-24 04:44:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 390b94e127729268f017482d3405c18f SHA-1: ba14ee9191855accc6cc9efd14e0920f3c0f1b7b SHA-256: d3c0589871922820a6722207cc67610acca5c9c6491e0e8580d20022723d7e46
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass external link farm, with a primary link pointing to a redirector at 'https://ttraff.cc/pify?keyword=whistleblowing+ethics+pdf'. This indicates a likely phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the document's structure and embedded links are sufficient to infer malicious intent.

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=whistleblowing+ethics+pdf
    • http://files.albertoniego.com/uploads/1/3/0/7/130776812/garexotiku_wivopevatuki_movuner_nugibotuso.pdf
    • http://files.magalidiskus.com/uploads/1/3/2/3/132303245/f76ec5a661e404.pdf
    • http://gotafan.puertoricandj.com/uploads/1/3/2/8/132814439/38e20004.pdf
    • https://cdn.shopify.com/s/files/1/0433/3531/9711/files/taruka.pdf
    • https://cdn.shopify.com/s/files/1/0432/2390/8520/files/95514805045.pdf
    • https://cdn.shopify.com/s/files/1/0431/0319/1193/files/nacionalidades_en_ingles.pdf
    • https://cdn.shopify.com/s/files/1/0428/0506/7943/files/26199261026.pdf
    • https://cdn.shopify.com/s/files/1/0437/1451/1001/files/dinofenosotawu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3246/8890/files/jugodesafodogivamifizapem.pdf
    • https://cdn.shopify.com/s/files/1/0432/3095/3627/files/98714705596.pdf
    • https://cdn.shopify.com/s/files/1/0435/8999/2605/files/11273147823.pdf
    • https://cdn.shopify.com/s/files/1/0429/1746/2182/files/police_collision_reporting_centre_oshawa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gijamibumiji.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006659.bin
991eb9f4ab83e259fe9697d412451338f21b7424e6fc6d49ef7c116ca848760d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6659 5144 bytes
font_01_sfnt_off000077e2.bin
25be06581825e54b248d2e778ea66b13f92c52b983edd303e1cdd4bb6d53469a
pdf-font-stream PDF embedded font (sfnt) at offset 0x77E2 10000 bytes
font_02_sfnt_off000099de.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x99DE 4324 bytes