Malicious PDF — malware analysis report

Static analysis result for SHA-256 94e7d278f9a0bfac…

MALICIOUS

PDF

40.3 KB Created: 2020-08-17 03:07:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a982b229ff02de7c37690e42c28c99e SHA-1: 3083aa0d439b2bb07ca98651a705466be00d3c31 SHA-256: 94e7d278f9a0bfac28a0354d36a86d5f2fa4c82e7bd9e2c04764d255a8cda512
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, also contains the URL for the malicious redirector. The presence of numerous external links, many pointing to Shopify, suggests an attempt at SEO manipulation or a link farm to distribute malicious content. No scripts were extracted, limiting the analysis of direct payload delivery mechanisms.

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.ru/pify?keyword=best+free+accurate+weather+app+android
    • http://files.vitro-fusing.com/uploads/1/3/0/7/130775221/tadufulojo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/accordi_canzoni_classiche_napoletane.pdf
    • https://cdn.shopify.com/s/files/1/0427/5752/1574/files/aurelius_augustine.pdf
    • https://cdn.shopify.com/s/files/1/0433/5307/9963/files/pabixesixaguni.pdf
    • https://cdn.shopify.com/s/files/1/0435/1311/8872/files/spencerian_practice_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0430/6288/6549/files/getumenen.pdf
    • https://cdn.shopify.com/s/files/1/0431/5761/8850/files/76286291784.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/92796646297.pdf
    • https://cdn.shopify.com/s/files/1/0432/5723/3576/files/zakirinumusugaragibamix.pdf
    • https://cdn.shopify.com/s/files/1/0435/5925/6225/files/84197904374.pdf
    • https://cdn.shopify.com/s/files/1/0433/3476/2664/files/443856616.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/sidosipudiwefedeziduwewa.pdf
    • https://cdn.shopify.com/s/files/1/0437/5920/6561/files/55635399886.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_off00005fcd.bin
9b955ac20ce2e88c74744d1780e8a9be9a63be87c395ceb8d5c801c5dc57d17c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCD 5352 bytes
font_01_sfnt_off0000720b.bin
7128f81a75692c57a43d799bcbb39c00279fa68a0fcba9a230b269a54fe4bc8d
pdf-font-stream PDF embedded font (sfnt) at offset 0x720B 10084 bytes