Malicious PDF — malware analysis report

Static analysis result for SHA-256 a17745aa0672a23b…

MALICIOUS

PDF

42.7 KB Created: 2020-08-23 07:45:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1414d40e5808c416a140ea4ba4b9523a SHA-1: c86ea1ea1088a1e86885258823301dd9b1b5b405 SHA-256: a17745aa0672a23bb573e36b790689c3f45f0c5148b1e2f1786291bef8e1757a
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains text related to a 'wow icy veins warlock guide' and the URL itself, suggesting a lure to entice users to click. The PDF also functions as a link farm, pointing to numerous other PDFs, likely for SEO manipulation or to distribute further malicious content. The ML classifier strongly flagged this PDF as malicious.

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=wow+icy+veins+warlock+guide
    • http://files.diskyoto.com/uploads/1/3/1/3/131379219/tovotofunemor.pdf
    • http://files.jamesmatthewwilson.com/uploads/1/3/1/6/131637057/d1e23bb.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/bidepagurinevodo.pdf
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/39159350406.pdf
    • https://cdn.shopify.com/s/files/1/0436/2895/3763/files/vavepesuniporu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1785/4373/files/analytical_chemistry_interview_questions.pdf
    • https://cdn.shopify.com/s/files/1/0437/7139/6257/files/66541509243.pdf
    • https://cdn.shopify.com/s/files/1/0428/2492/5347/files/46237768397.pdf
    • https://cdn.shopify.com/s/files/1/0433/0776/1819/files/78373348734.pdf
    • https://cdn.shopify.com/s/files/1/0429/9699/0105/files/rarivinoxofilepij.pdf
    • https://cdn.shopify.com/s/files/1/0436/0932/5730/files/cadette_book_artist_badge.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wetitoditasenubekuxon.pdf
    • https://cdn.shopify.com/s/files/1/0434/1687/9271/files/vinayaka_chavithi_katha_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2686/6599/files/vidmate_apk_free_4._1807.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_off00006294.bin
7884fc749342b3fbd6cddefd0395751d5ed84c98ef461fd9ed44f32bb30a6b7b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6294 5436 bytes
font_01_sfnt_off0000753f.bin
e59dc00788b85482dbbceeb2a61179bff40a752a82d1292920921eddbb1bad19
pdf-font-stream PDF embedded font (sfnt) at offset 0x753F 12776 bytes