Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f95f1f62cc29e70…

MALICIOUS

PDF

45.6 KB Created: 2020-08-01 09:57:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e8621cc418a013e5a377c92acc6a2f1 SHA-1: c45f244e73cca5f83ba87e8a9f58bc403a79fbbe SHA-256: 9f95f1f62cc29e707f43f88b0c30464765c97b804f63e2d47d4aaa98e2616862
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious File: Malicious Link

The PDF document was flagged as malicious by a machine learning classifier and contains a high number of embedded links. One critical heuristic indicates that these links point to known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=the+red+sea+rules+pdf'. The document appears to be part of a link farm or SEO poisoning campaign, designed to drive traffic to potentially harmful websites.

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=the+red+sea+rules+pdf
    • http://files.makingbristolbetter.com/uploads/1/3/1/4/131453990/92483ff2.pdf
    • http://files.oradesignsohio.com/uploads/1/3/1/3/131379382/b86afee9f.pdf
    • http://files.cambridgeharriers.com/uploads/1/3/1/3/131383283/40262bddad3.pdf
    • http://files.wilcotrackandfield.org/uploads/1/3/0/8/130874257/vosavewuvasipon-piboriwamozi-gimata-vimajunifikox.pdf
    • https://cdn.shopify.com/s/files/1/0435/4405/1864/files/82174308091.pdf
    • https://cdn.shopify.com/s/files/1/0430/0649/2823/files/velatoxixevixubilobamev.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mojedisubeweful.pdf
    • https://cdn.shopify.com/s/files/1/0430/9005/1221/files/difomiguzedil.pdf
    • https://cdn.shopify.com/s/files/1/0435/2638/9912/files/tizovemolibasig.pdf
    • https://cdn.shopify.com/s/files/1/0430/2848/0157/files/jivovu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9511/3374/files/tafoxarej.pdf
    • https://cdn.shopify.com/s/files/1/0428/7656/7711/files/xofirurobuzijakekonibilod.pdf
    • https://cdn.shopify.com/s/files/1/0431/1724/8672/files/fokodorok.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_off000065ac.bin
f734c57e7ef3d4a13dddffb14aabfd93f7863685d3d5f4a81831856836ca125f
pdf-font-stream PDF embedded font (sfnt) at offset 0x65AC 4616 bytes
font_01_sfnt_off00007566.bin
1dd0cd925cc58eb47ec791aacd0e864deb5c20b76f3e64b6f08fe494d9db8ad0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7566 10912 bytes
font_02_sfnt_off00009a54.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A54 4324 bytes