Malicious PDF — malware analysis report

Static analysis result for SHA-256 f202388c4a13ee0d…

MALICIOUS

PDF

64.3 KB Created: 2020-08-23 06:16:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3147e977358067faeee89601705c2036 SHA-1: 8d5f940aeda5901df6c6cbc9eeb6ccfa02795e21 SHA-256: f202388c4a13ee0d106a30089472057f5ad22f54d43687c3ff5ebbc853058a06
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lure users with search terms like "best c v format in word". The document also hosts a large number of external PDF links, many pointing to Shopify, likely as part of an SEO manipulation or link farm tactic. The ML classifier strongly indicates maliciousness, and the embedded URL heuristic confirms the presence of links within the document body.

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=best+c+v+format+in+word
    • http://files.celinacares.com/uploads/1/3/0/7/130776822/fb51dd466bf.pdf
    • https://cdn.shopify.com/s/files/1/0437/9194/1781/files/9410297443.pdf
    • https://cdn.shopify.com/s/files/1/0431/4457/7178/files/6822676105.pdf
    • https://cdn.shopify.com/s/files/1/0428/5507/1900/files/dexter_imdb_parents_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/2601/4620/files/case_in_point_full.pdf
    • https://cdn.shopify.com/s/files/1/0437/7962/1026/files/80138439960.pdf
    • https://cdn.shopify.com/s/files/1/0457/8344/9756/files/19311708945.pdf
    • https://cdn.shopify.com/s/files/1/0427/7141/5196/files/31792383494.pdf
    • https://cdn.shopify.com/s/files/1/0432/8452/9310/files/34469719481.pdf
    • https://cdn.shopify.com/s/files/1/0431/5833/9733/files/96642361780.pdf
    • https://cdn.shopify.com/s/files/1/0431/9028/8541/files/tijovo.pdf
    • https://cdn.shopify.com/s/files/1/0435/1790/3003/files/fugugope.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_off0000b1ec.bin
5689c1ec4e6b780a55b021797b8c2d90a69522a0fe82cd2d90f90e4ff551325c
pdf-font-stream PDF embedded font (sfnt) at offset 0xB1EC 5124 bytes
font_01_sfnt_off0000c348.bin
19281e8c115c860e532b693e691f04aeaa71c97cf5e47e18830e9d144b05f7a5
pdf-font-stream PDF embedded font (sfnt) at offset 0xC348 10296 bytes
font_02_sfnt_off0000e650.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xE650 4324 bytes