Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7ea6393d1416de4…

MALICIOUS

PDF

41.6 KB Created: 2020-08-30 18:47:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36b82f32cd6167e2ae6b5fc923d307dc SHA-1: becea194017cb72a39d0bbaf5ba97d3c0e47df35 SHA-256: f7ea6393d1416de4935208a2debb3ca3e4f8aa1a81d542f0b4f7678803dd04ea
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=how+to+leave+a+clan+destiny+2'. This indicates the document's primary purpose is to redirect the user to a malicious site. The presence of a large number of external PDF links, many hosted on Shopify, further supports a link farm or SEO poisoning attack vector. No scripts were extracted, and the document body is heavily obfuscated, but the malicious URL is clear.

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/wix?keyword=how+to+leave+a+clan+destiny+2
    • https://cdn.shopify.com/s/files/1/0431/8792/9249/files/65757051293.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/58085676994.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/24461903886.pdf
    • https://cdn.shopify.com/s/files/1/0427/4506/9724/files/zebugelo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0455/8486/files/23620897368.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/46902406380.pdf
    • https://cdn.shopify.com/s/files/1/0427/7351/2359/files/depakorenilinumometujamef.pdf
    • https://cdn.shopify.com/s/files/1/0430/1848/5923/files/degrees_of_comparison_worksheet_for_class_3.pdf
    • https://static.usrfiles.com/ugd/b8c837_7f4278d71d22471597b283dbeea6eddd.pdf
    • https://static.usrfiles.com/ugd/b8c837_40722fb096944740834fc8603b10f9a3.pdf
    • https://static.usrfiles.com/ugd/de3d83_e7ba2eb41106445ca93b0ad135939d9e.pdf
    • https://static.usrfiles.com/ugd/c1615c_b098261fc69340a0b0a44e79de6031cb.pdf
    • https://static.usrfiles.com/ugd/9374a7_89744ebc6bc4423c959e4dabe14a24a4.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_off000053de.bin
f3f08f5b8424c2456c2bc0ff571c7a0ca20a60f3c06d42f52ee9224accaafa39
pdf-font-stream PDF embedded font (sfnt) at offset 0x53DE 5024 bytes
font_01_sfnt_off00006594.bin
a1820259e6c66b905ce8e812d1e1a2365b29b6c6f6f2b2dac5bb9016ffa99b2e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6594 5184 bytes
font_02_sfnt_off00007762.bin
a5326245608210214038baeb74c52231bcc7af6538c30fd14b1942e940f65885
pdf-font-stream PDF embedded font (sfnt) at offset 0x7762 9976 bytes