Malicious PDF — malware analysis report

Static analysis result for SHA-256 1853e23e3fd53460…

MALICIOUS

PDF

39.5 KB Created: 2020-09-01 09:07:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31ff224c8f5bdba580eb0036bf331331 SHA-1: fb0777f4a0b9e1e038dfe12e0441467466b1e6a2 SHA-256: 1853e23e3fd53460c1bab8ffdc192865c913bd1c96d325af3772dea1ae3aefa7
154 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body and PDF facts reveal a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. While no scripts were directly extracted, the presence of embedded URLs and the malicious redirector link strongly indicate an attempt to direct users to harmful 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.ru/wix?keyword=core+competencies+bc+template
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mozinetesabelenigifil.pdf
    • https://cdn.shopify.com/s/files/1/0433/6808/7711/files/farizupubimadixux.pdf
    • https://cdn.shopify.com/s/files/1/0430/6042/8962/files/36304552724.pdf
    • https://cdn.shopify.com/s/files/1/0428/1267/0111/files/sap_mm_configuration_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/5035/3318/files/64959600750.pdf
    • https://static.usrfiles.com/ugd/b8c837_ddb5693a4e1948ef990733007f7e0f32.pdf
    • https://static.usrfiles.com/ugd/8acad3_24ec17018a5b478ea0b73e5a5dcc339b.pdf
    • https://static.usrfiles.com/ugd/79e0dc_5723d35ae1bc44dfa6870c4ab3e444bf.pdf
    • https://cdn.shopify.com/s/files/1/0428/7823/8886/files/handbook_of_granular_computing.pdf
    • https://cdn.shopify.com/s/files/1/0434/7595/9973/files/beery_vmi_scoring_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/6003/files/60076532072.pdf
    • https://cdn.shopify.com/s/files/1/0433/9934/8389/files/96615542508.pdf
    • https://cdn.shopify.com/s/files/1/0434/2779/1009/files/56113786822.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_off00005e95.bin
f8fcabe90c91feb23a35afe3809dc9d47821e67bf13e035be8cd831a4e1d62ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E95 5124 bytes
font_01_sfnt_off00006fe0.bin
d1ec6133bfd1a519fa4a8f78adcf76d8a245e4644c4698aa3d70e31812f5e6c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE0 9832 bytes