Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f1ae7b77af1a27b…

MALICIOUS

PDF

44.1 KB Created: 2020-08-31 08:23:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50082544fb77d3a6a3b8216adead58b6 SHA-1: d4384a46f7d2282080a3f860de561ed1aa3719a5 SHA-256: 6f1ae7b77af1a27b996a2d9e5366461cf723933d56d7bc303febcb62db7b593b
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical redirector link pointing to 'https://ttraff.cc/wix?keyword=berserk+of+gluttony+light+novel+volume+4+pdf'. This suggests the document is designed to redirect users to malicious infrastructure, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent.

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/wix?keyword=berserk+of+gluttony+light+novel+volume+4+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/18f527_783fd93fe83240d3836eba9846201045.pdf
    • https://static.usrfiles.com/ugd/696b8a_d6b48d0007504cfb8a383370c5075b81.pdf
    • https://static.usrfiles.com/ugd/b8c837_4a625bdb0bbc4245b356fa1e0d79689b.pdf
    • https://cdn.shopify.com/s/files/1/0437/5655/2343/files/mc_command_center_story_progression.pdf
    • https://static.usrfiles.com/ugd/b8c837_b333c4d086224df4b36d7181bd313ca5.pdf
    • https://static.usrfiles.com/ugd/97aff7_596dcd4d48ab4086bdc6df4c5fae5810.pdf
    • https://static.usrfiles.com/ugd/b8c837_7cd07d6a290341e78b8e927004c7b71b.pdf
    • https://static.usrfiles.com/ugd/b8c837_45fcee81de534e069bef27cfacd47722.pdf
    • https://cdn.shopify.com/s/files/1/0427/9848/1564/files/sosupetopimatevegigawowaz.pdf
    • https://cdn.shopify.com/s/files/1/0427/8992/9116/files/tukinebutemivemisejo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/a_christmas_carol_original_book.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a18.bin
a645d3250783eb5a1136e3387cde38ae6e6320ee9c80dcd7c717ca169039c394
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A18 8852 bytes
font_01_sfnt_off000067fa.bin
48aaa083113638da70cec1a1023215637d2963a41f7ae14e06a84b92582d3910
pdf-font-stream PDF embedded font (sfnt) at offset 0x67FA 5608 bytes
font_02_sfnt_off00007b01.bin
15a6c5a554991ed882a900f19ffa01c5f815dadb109a23b11ebc53bc0974abb9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B01 13508 bytes