Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ab917561227905d…

MALICIOUS

PDF

44.0 KB Created: 2020-07-28 05:17:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 084466bd63d5f01285e4e5c460948fca SHA-1: ab5a20bcc8f82162e155953ea01d14e9e34f195a SHA-256: 5ab917561227905d71940668f348d66690b57c02ec9979be3c732f949382762b
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm designed for SEO manipulation. One critical heuristic identified a link to known malicious redirector infrastructure. While no scripts were extracted, the presence of numerous links and the ML classifier's high confidence suggest a malicious intent to redirect users to harmful sites, likely as part of a phishing or scam campaign.

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/pify?keyword=reciprocal+functions+worksheet+pdf
    • http://files.journey-to-alaska-adventures.com/uploads/1/3/1/4/131453522/gebuzuruzav-nuzile-wumizabovoboja.pdf
    • http://files.poweryogaflow.com/uploads/1/3/0/7/130776338/7399846.pdf
    • http://files.macaelstone.com/uploads/1/3/0/7/130775092/2753714.pdf
    • http://files.torahdec.org/uploads/1/3/0/7/130739542/gejizimezen_nipula_panad_xatiludixe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5486/6333/files/taxefogafag.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21533622499.pdf
    • https://cdn.shopify.com/s/files/1/0433/5504/6037/files/58039250047.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/48755911159.pdf
    • https://cdn.shopify.com/s/files/1/0430/2536/7194/files/basopefaratotimilev.pdf
    • https://cdn.shopify.com/s/files/1/0432/2790/6206/files/26992673480.pdf
    • https://cdn.shopify.com/s/files/1/0430/3428/0087/files/muzopigalejixelaze.pdf
    • https://cdn.shopify.com/s/files/1/0429/6487/7471/files/nazonaripog.pdf
    • https://cdn.shopify.com/s/files/1/0429/0769/7305/files/69684295077.pdf
    • https://cdn.shopify.com/s/files/1/0432/7240/5157/files/28471220709.pdf
    • https://cdn.shopify.com/s/files/1/0440/3062/3894/files/wowagelupodixizaxosama.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_off00006ebc.bin
0919106b98a6a1db1728125306799ec78b047eea2fc484f000e4b25f4dd60a00
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBC 5288 bytes
font_01_sfnt_off000080b7.bin
dff2581477323b35d6e1076180ec32b467d2bbbe284ed5c37fbef112e1bddd35
pdf-font-stream PDF embedded font (sfnt) at offset 0x80B7 10076 bytes