Malicious PDF — malware analysis report

Static analysis result for SHA-256 01b23375f28c5683…

MALICIOUS

PDF

41.2 KB Created: 2020-08-12 03:32:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 168c36404691dbcbd01d80d78ea1600a SHA-1: fe8901ca1489140f73c1c83f7aa5f23797fbc6e7 SHA-256: 01b23375f28c56833126493ca114f2fec5dd0de8df93da1e1b0519695e83eaf4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links, including one pointing to a known malicious redirector, suggesting a link farm or phishing attempt. The ML classifier strongly flagged this PDF as malicious. The embedded URLs and the PDF structure indicate an attempt to drive traffic to malicious infrastructure, likely for further exploitation or credential harvesting.

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.com/pify?keyword=automates+programmables+industriels+pdf
    • http://files.gaythessaloniki.com/uploads/1/3/1/4/131453206/zoronofami-letonikenajuv.pdf
    • http://tumowowa.fussfreefunerals.com/uploads/1/3/0/9/130969352/1451085.pdf
    • http://files.marthasvine.com/uploads/1/3/1/4/131408970/5883455.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0454/7464/4120/files/calculus_problems_with_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0428/1643/8438/files/21428041989.pdf
    • https://cdn.shopify.com/s/files/1/0439/0099/3704/files/rorejulagiw.pdf
    • https://cdn.shopify.com/s/files/1/0435/0712/2342/files/86462336299.pdf
    • https://cdn.shopify.com/s/files/1/0439/2694/5947/files/jesus_christ_his_mission_and_ministry.pdf
    • https://cdn.shopify.com/s/files/1/0428/3141/3404/files/bovizunuxepikimokuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rerivavegexem.pdf
    • https://cdn.shopify.com/s/files/1/0431/7832/8221/files/bobutijiweruw.pdf
    • https://cdn.shopify.com/s/files/1/0437/1474/0373/files/91500893000.pdf
    • https://cdn.shopify.com/s/files/1/0433/3459/8809/files/regapalurisogubibiw.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062df.bin
8deeb0647a199ae67f3b72d67fe181df8caca2f667065e1f3232efa17fc29933
pdf-font-stream PDF embedded font (sfnt) at offset 0x62DF 5492 bytes
font_01_sfnt_off0000756b.bin
b8554d8244b034743bce5917de160b391938bead8f66b0e4ee5af11191034045
pdf-font-stream PDF embedded font (sfnt) at offset 0x756B 10216 bytes