Malicious PDF — malware analysis report

Static analysis result for SHA-256 95919906dd58b86e…

MALICIOUS

PDF

40.0 KB Created: 2020-08-21 06:01:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 271aa3ec09358bd040e73507f9d30f7e SHA-1: 3e0deacb679035dc5079a099049c934769034962 SHA-256: 95919906dd58b86e716ffee0de52b703d80fd4df557e5051364681b5b7c71519
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.cc/pify?keyword=inspection+report+app', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to an 'Inspection report app' and the wkhtmltopdf tool, suggesting a lure. The presence of numerous other links, many pointing to shopify.com, indicates a link farm strategy, likely to obscure the malicious destination. 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=inspection+report+app
    • http://tadaxor.seedsborntolight.candletothesun.com/uploads/1/3/2/6/132696111/6920c.pdf
    • https://cdn.shopify.com/s/files/1/0439/1400/2587/files/astrologa_maya.pdf
    • https://cdn.shopify.com/s/files/1/0437/8991/0167/files/13216621190.pdf
    • https://cdn.shopify.com/s/files/1/0429/3964/6108/files/wibiw.pdf
    • https://cdn.shopify.com/s/files/1/0438/9512/8216/files/44978770079.pdf
    • https://cdn.shopify.com/s/files/1/0434/0937/5383/files/79984380542.pdf
    • https://cdn.shopify.com/s/files/1/0428/0870/5187/files/parojuninupex.pdf
    • https://cdn.shopify.com/s/files/1/0436/4340/4441/files/how_to_change_java_version.pdf
    • https://cdn.shopify.com/s/files/1/0433/8686/3783/files/nevimelowamufemipi.pdf
    • https://cdn.shopify.com/s/files/1/0440/5572/4197/files/41169985325.pdf
    • https://cdn.shopify.com/s/files/1/0433/5733/9803/files/cacique_tango_brasileiro.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_off00005f0c.bin
db7293f09d5dd2b9acba0df92eb157acea2a4663bb17bb84087ea9ce209f7c34
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F0C 4832 bytes
font_01_sfnt_off00006f7a.bin
e40d4845dd620cccd58b998dbf4e8a3b2dd874b5eeae2afd322268d1bfc4ea99
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F7A 10684 bytes