Malicious PDF — malware analysis report

Static analysis result for SHA-256 169897b87c06dbeb…

MALICIOUS

PDF

60.9 KB Created: 2020-08-12 17:35:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 801fb0580a04a4128e6ae1a7a6e51b77 SHA-1: 66a3f1944b28f6fdb36a9ef346688a457abfcd81 SHA-256: 169897b87c06dbebbd6719949b043f82a2311cb8e8a3cae86ad1a3dfee62674c
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector service, which is a common tactic for phishing and malware distribution. The document body, though heavily obfuscated, contains text related to '7th grade math workbook with answers pdf' and a URL that appears to be part of a link farm. The presence of a malicious redirector link strongly suggests an attempt to lead the user to a malicious site.

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/pify?keyword=7th+grade+math+workbook+with+answers+pdf
    • http://files.jacquelinestanford.com/uploads/1/3/0/7/130775635/gigogeziviruti.pdf
    • http://files.palmamingozzi.com/uploads/1/3/1/4/131438316/cf2f7d7c6504.pdf
    • http://files.clcciowa.com/uploads/1/3/0/9/130969440/vamipi_dimazodugoka_pavidufevisuzid_totilunipozux.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5495/5672/files/wozotepa.pdf
    • https://cdn.shopify.com/s/files/1/0435/0813/8150/files/43891858290.pdf
    • https://cdn.shopify.com/s/files/1/0431/2157/4049/files/ketijekojuloda.pdf
    • https://cdn.shopify.com/s/files/1/0432/3124/8541/files/random_phrase_generator.pdf
    • https://cdn.shopify.com/s/files/1/0431/1918/1978/files/59741686013.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/jataziki.pdf
    • https://cdn.shopify.com/s/files/1/0434/3853/8904/files/17701248398.pdf
    • https://cdn.shopify.com/s/files/1/0432/0333/0208/files/34976320163.pdf
    • https://cdn.shopify.com/s/files/1/0430/1455/3763/files/wexufatawerivirefumu.pdf
    • https://cdn.shopify.com/s/files/1/0437/3771/0744/files/23355229864.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/60291298735.pdf
    • https://cdn.shopify.com/s/files/1/0440/8089/0008/files/sonukinanulolawikegaropi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7198/7098/files/776949921.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009f3a.bin
160ce1f4f33f7015272c6c90f2eec4913f289de80432c67f9ca9002e6c5233b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F3A 1920 bytes
font_01_sfnt_off0000a847.bin
fdef8e9b8619d6e39a09de52f6ea7f4ff626ce4d4421e6809ab6941ee23ebac9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA847 5704 bytes
font_02_sfnt_off0000bbab.bin
0e0828c81f9565c68ad80e03b070cf540a2be49fad689c0dccc4e4759d5bdbaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBAB 13096 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.