Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d54d4679ac69cbb…

MALICIOUS

PDF

44.3 KB Created: 2020-08-30 07:47:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d350e0855b81a98e2e46b153dfa9afc2 SHA-1: c7bcf9f06ebcf8b6b2a8d8896b4222de6b49392b SHA-256: 1d54d4679ac69cbbc2d1af5bcfbe6f0333c11e9f8c2eb29827371f4601329774
152 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though partially corrupted, contains the URL 'https://ttraff.cc/wix?keyword=como+hacer+gelatinas+artisticas', which is also listed as a malicious redirector. The presence of a large number of PDF links suggests a link farm or SEO poisoning attempt to distribute malicious content.

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=como+hacer+gelatinas+artisticas
    • https://static.usrfiles.com/ugd/b8c837_8a03a118122a442e9961a8327c638190.pdf
    • https://static.usrfiles.com/ugd/b8c837_da1b1a8103a14a45aa0ef5dd491053d8.pdf
    • https://static.usrfiles.com/ugd/4d6844_4d714a0ea7b74d9491f393f4869f114a.pdf
    • https://cdn.shopify.com/s/files/1/0438/3473/6797/files/lopununevedumuledex.pdf
    • https://cdn.shopify.com/s/files/1/0439/0112/4760/files/ponulodagavifadi.pdf
    • https://static.usrfiles.com/ugd/93c935_7fda79e8af1b4620ba72948aae5c81a4.pdf
    • https://static.usrfiles.com/ugd/c1de29_ffd07f27610340d2974b93e860767954.pdf
    • https://static.usrfiles.com/ugd/98857b_2a181aa7a8fd4549ae3ca40498e344f9.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bovegutug.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7618/files/39305939085.pdf
    • https://cdn.shopify.com/s/files/1/0430/3178/9721/files/lafarge_portland_cement_safety_data_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27621352833.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_off000060da.bin
2f7f6b7df4bdd91bb943bebe3779de472b62522a7a299fdfd72ffe9adae9c5a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x60DA 5024 bytes
font_01_sfnt_off000071be.bin
4b9aa5c1fe3f5d62bdc3edb2b7b1f34708e8f6ca83cee486621525e8a8734d00
pdf-font-stream PDF embedded font (sfnt) at offset 0x71BE 10828 bytes
font_02_sfnt_off00009491.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0x9491 4324 bytes