Malicious PDF — malware analysis report

Static analysis result for SHA-256 17560b4dc6d177bd…

MALICIOUS

PDF

49.4 KB Created: 2020-08-30 20:19:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7bc2acdf62f38b719dba6e02b61a7c89 SHA-1: 69107e52af9afae17881a6aa3fed8b9054115eb3 SHA-256: 17560b4dc6d177bd01a94cf1372a3fd9ae60835fe36590a0e8938a22b9631c38
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious URL, disguised as a 'Path of Exile build guide'. The ML classifier strongly indicates maliciousness, and the PDF is designed as a link farm, likely to drive traffic to the malicious redirector. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

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=path+of+exile+build+guide+marauder
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_2fb3e57e73b34600926a1f02be3caadf.pdf
    • https://static.usrfiles.com/ugd/5b5da7_bd6971e277ca49e99241471bbf30121b.pdf
    • https://static.usrfiles.com/ugd/b8c837_30cbbff6f7f64975a77cab0c48fddace.pdf
    • https://cdn.shopify.com/s/files/1/0462/3810/5749/files/present_ministers_of_karnataka.pdf
    • https://cdn.shopify.com/s/files/1/0439/2825/6680/files/business_continuity_plan_template.pdf
    • https://static.usrfiles.com/ugd/b8c837_aed35aa1fc134d989308ae735df3f3d2.pdf
    • https://static.usrfiles.com/ugd/b8c837_0a9bb2e478b94351bfe9df9a0d1e2d59.pdf
    • https://static.usrfiles.com/ugd/0dd040_4fdc182a80be40538a1d6ec0032516a1.pdf
    • https://static.usrfiles.com/ugd/67f5f7_6672570688c14b5b99d3b975681cc3da.pdf
    • https://static.usrfiles.com/ugd/b8c837_c8c2e267e4b74361af773f31ab0b98db.pdf
    • https://static.usrfiles.com/ugd/b8c837_d6130db66aeb4747bc5fd1d2e16091de.pdf
    • https://static.usrfiles.com/ugd/b8c837_3c3cc0356b834e2e870de99316f5df94.pdf
    • https://static.usrfiles.com/ugd/b8c837_543d269272a24a689d5f9a5bbf8546a8.pdf
    • https://static.usrfiles.com/ugd/1decf9_cccac2473678434fbb8327c665edfa28.pdf
    • https://static.usrfiles.com/ugd/b8c837_32bc560b756d44e78d1964fecf29cc72.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_off000083d3.bin
d61d8fcc920430b8ce626656953656a791fbadf84cbac5bb282927cabd7a00d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x83D3 5352 bytes
font_01_sfnt_off000095e6.bin
0b4626af59a0d748aa207d46a1f49b6315c43af08d38866555dbf1cb4c5ecdd6
pdf-font-stream PDF embedded font (sfnt) at offset 0x95E6 10140 bytes