Malicious PDF — malware analysis report

Static analysis result for SHA-256 76cab52b09d7114c…

MALICIOUS

PDF

43.8 KB Created: 2020-09-12 02:59:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3369d0141530574383dce707fb2fd05b SHA-1: aff32f3caf5545f58bb61cda473b109672df702e SHA-256: 76cab52b09d7114c23c7373704056423cb83b32bca605c5dcb34743feaff935d
162 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific redirector URL, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains text suggesting a 'drill down report in excel' lure, which aligns with the malicious redirector URL. The presence of numerous PDF links suggests an attempt to manipulate search engine results or distribute further malicious content.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.me/wix?keyword=drill+down+report+in+excel
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/5283/3687/files/74196760271.pdf
    • https://cdn.shopify.com/s/files/1/0465/0074/1272/files/bilanzen_richtig_lesen.pdf
    • https://cdn.shopify.com/s/files/1/0430/0292/1111/files/39002874988.pdf
    • https://cdn.shopify.com/s/files/1/0434/3899/7669/files/69375368176.pdf
    • https://cdn.shopify.com/s/files/1/0437/8558/4792/files/9._4_naming_and_writing_formulas_for_acids_and_bases.pdf
    • https://static.usrfiles.com/ugd/eed56f_60581ef1e09d490a96626f573c7b6b5b.pdf
    • https://static.usrfiles.com/ugd/b8c837_396b74fddcfa4f3ea21613a5cf13104d.pdf
    • https://static.usrfiles.com/ugd/6116da_d5964c51de664ac1af0fb3a928a039ad.pdf
    • https://static.usrfiles.com/ugd/d31907_da9e982fa85549f292953bbe300f1bf5.pdf
    • https://static.usrfiles.com/ugd/516574_80bc6abb1407476ea4b8d0378809a17f.pdf
    • https://static.usrfiles.com/ugd/e2c250_6467fc0d1cd248c9b9c8ad12e9ee2396.pdf
    • https://static.usrfiles.com/ugd/739437_3b4c515578224ce8afa2dfdfcec0ba02.pdf
    • https://static.usrfiles.com/ugd/c1108c_3c21071abae24495a80faa9792583607.pdf
    • https://static.usrfiles.com/ugd/909b15_ae475f43ae3d448cb7cd4d365bf7878b.pdf
    • https://static.usrfiles.com/ugd/0047a4_c90e328583da474790ecee339a3f144c.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_off00006ffa.bin
22c21cc867b3ece8c0791769432a3dbc3668af86eaeb8e3132456ced18647dd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FFA 4836 bytes
font_01_sfnt_off00008097.bin
224d40e0e306057cf661197ffcfd3e56226841b6c3dacb2195c4a9d1e8cac80e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8097 10004 bytes

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