Malicious PDF — malware analysis report

Static analysis result for SHA-256 181d7bec6c7502c7…

MALICIOUS

PDF

42.9 KB Created: 2020-08-19 13:46:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8b390993221651dcc27f4c78ddabd1e SHA-1: 809c5f386e1c0af4e888120d546c356d5b4f3ee6 SHA-256: 181d7bec6c7502c7d4c7e7b7fe8f2b0d64f88e2ca67bf31604d5d356b138fb1d
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text referencing 'Apc smart- ups c 1000va manual' and the malicious URL, suggesting a lure to download a malicious file or visit a compromised site. The presence of many Shopify links, some benign and some unknown, indicates a link farm strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=apc+smart-+ups+c+1000va+manual
    • http://files.clydepartinmoncoinc.com/uploads/1/3/1/4/131437029/7358677.pdf
    • http://files.funactingstudios.com/uploads/1/3/1/4/131483147/geletivififufeb.pdf
    • http://juxilobo.interislandair.com/uploads/1/3/1/3/131380582/5711608.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2253/2251/files/40435054629.pdf
    • https://cdn.shopify.com/s/files/1/0431/7839/3749/files/xokozikeja.pdf
    • https://cdn.shopify.com/s/files/1/0427/4061/3286/files/kepugo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6854/5442/files/27338195680.pdf
    • https://cdn.shopify.com/s/files/1/0430/6790/0058/files/xofuro.pdf
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/40475640274.pdf
    • https://cdn.shopify.com/s/files/1/0431/7990/1096/files/84767621614.pdf
    • https://cdn.shopify.com/s/files/1/0431/5391/6060/files/59206205037.pdf
    • https://cdn.shopify.com/s/files/1/0430/5630/0186/files/xozilaguvul.pdf
    • https://cdn.shopify.com/s/files/1/0430/7802/5377/files/21738378228.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_off0000624c.bin
99c36a96a2c79086cd4d0611448dd85f26952d6883eb63be0a9bfdf0134b23bd
pdf-font-stream PDF embedded font (sfnt) at offset 0x624C 5352 bytes
font_01_sfnt_off00007472.bin
3cd4b0feee9063f5311f138a288cb6bb077eb5449362bc70deb3e750c7029d09
pdf-font-stream PDF embedded font (sfnt) at offset 0x7472 15028 bytes