Malicious PDF — malware analysis report

Static analysis result for SHA-256 9244c1aa050652e8…

MALICIOUS

PDF

42.3 KB Created: 2020-09-06 21:57:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1976d790107b9e6cef1f3800e7153db SHA-1: 93c39aef59e49a1f1f55de8e9e76bede03eeeeda SHA-256: 9244c1aa050652e816dcd155067ef1aaa4842079d291d82e18dadf27aabb10fd
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, disguised with a keyword related to hotel management. The ML classifier strongly indicated maliciousness, and the PDF was identified as a link farm, suggesting a phishing or malware distribution attempt. 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.link/wix?keyword=ipd+full+form+in+hotel+management
    • https://static.usrfiles.com/ugd/9c43ec_265545a9c35a411b857232b4a1290814.pdf
    • https://static.usrfiles.com/ugd/205ae4_dd8e45858ffd488fb556d5570bbf8bac.pdf
    • https://static.usrfiles.com/ugd/5b5da7_ce02643a65ea4e3582f7e301a48abb2f.pdf
    • https://static.usrfiles.com/ugd/b8c837_efab7b681d9a43dfa11e5b6b10af5f43.pdf
    • https://static.usrfiles.com/ugd/b8c837_ec67cc3a1201451396d892e0c2da5cc6.pdf
    • https://static.usrfiles.com/ugd/9904c2_0fbece4bd07b441cb52c8a831379fc01.pdf
    • https://static.usrfiles.com/ugd/dc51bb_496d5f35b1bd40e3901ca128bd166f45.pdf
    • https://static.usrfiles.com/ugd/963627_655bb9f4f2f943f48c3c8146765879fe.pdf
    • https://static.usrfiles.com/ugd/49be48_ec65283225cd48ea8c5c4f43a8134b9b.pdf
    • https://static.usrfiles.com/ugd/b8c837_3367e658e42746dfaa533ddcfa22ec36.pdf
    • https://static.usrfiles.com/ugd/b8c837_a3cad2136d6542f1aba21b3d59d0316f.pdf
    • https://static.usrfiles.com/ugd/55e2c6_71bfb6a351634858a7ba2f3ab21aa850.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_off000059be.bin
b1cd0fdb7c8f64bdb6770b582a9d0edc07476661fe65829176a5b8682489e9f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x59BE 5096 bytes
font_01_sfnt_off00006ae0.bin
6e840dd81f55ab4ad7fee33c0c086408f01c309665d127aaa264d19b48005e43
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE0 10376 bytes
font_02_sfnt_off00008e57.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E57 4324 bytes