Malicious PDF — malware analysis report

Static analysis result for SHA-256 517a458ac34374f7…

MALICIOUS

PDF

52.7 KB Created: 2020-09-01 00:06:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eeb867afd74125f18ffdb00ab5807c4a SHA-1: c4dfefc363a715df892ea9cc1fe0955b16ad4408 SHA-256: 517a458ac34374f7b7c23d20a4ba258ef2bec3b672060ea4ff2bab244faa209f
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of embedded links, suggesting a link farm. The primary malicious URL identified is https://ttraff.com/pify?keyword=ain%2527+t+it+funny+jlo, which is likely used to obscure the true destination of the malicious content. The document body contains garbled text but also includes the suspicious URL, reinforcing its role in a redirection scheme.

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.com/pify?keyword=ain%2527+t+it+funny+jlo
    • https://cdn.shopify.com/s/files/1/0429/9508/9559/files/uno_challenge_rule.pdf
    • https://cdn.shopify.com/s/files/1/0428/3983/4791/files/distress_tolerance_skills_self_soothing.pdf
    • https://cdn.shopify.com/s/files/1/0460/7138/2180/files/rheumatology_journals_case_reports.pdf
    • https://cdn.shopify.com/s/files/1/0429/8027/8426/files/34317169614.pdf
    • https://cdn.shopify.com/s/files/1/0436/2898/6531/files/33686591976.pdf
    • https://cdn.shopify.com/s/files/1/0433/1290/6405/files/40499587754.pdf
    • https://static.usrfiles.com/ugd/8a419d_abec0eba27e3407db8f98f2de4b510a5.pdf
    • https://static.usrfiles.com/ugd/87fdc7_32ff5d16ec1a4de9aa05c72eb221775f.pdf
    • https://static.usrfiles.com/ugd/4e6dd5_56f8dcf54e234fb1bca1682e4741f9af.pdf
    • https://cdn.shopify.com/s/files/1/0429/8476/7647/files/janogasodejetog.pdf
    • https://cdn.shopify.com/s/files/1/0434/6334/4280/files/46461353131.pdf
    • https://cdn.shopify.com/s/files/1/0428/5644/8156/files/4778332859.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_off00007673.bin
be700d6dc9168137449bb81742d3e5356568017518f11ea3d0484f4df4797d19
pdf-font-stream PDF embedded font (sfnt) at offset 0x7673 4008 bytes
font_01_sfnt_off0000848b.bin
92ec7a21c30fc9984491fd7366c5a62026ab3354b2017a9ae1b20b6d7917c6ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x848B 4476 bytes
font_02_sfnt_off000093f5.bin
21808bc86d5a0fdc9fb1993c7c4934783a0a0fd319d92e413b27e885043f9c4f
pdf-font-stream PDF embedded font (sfnt) at offset 0x93F5 16108 bytes