Malicious PDF — malware analysis report

Static analysis result for SHA-256 09adeda792eae295…

MALICIOUS

PDF

46.5 KB Created: 2020-07-30 15:50:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e282b6a9fa7821d7e993380c26ae7b0 SHA-1: f34dd861362a2a52b768c3340cbc3322ad33c0cc SHA-256: 09adeda792eae2951cd8da6845122b3aa7c838926098a71152236d7d17e1f7aa
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one pointing to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document body appears to be malformed or corrupted, preventing a clear understanding of its intended lure, but the presence of numerous external links suggests an attempt to drive traffic to potentially malicious sites, possibly for phishing or SEO poisoning.

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.com/pify?keyword=deductive+and+inductive+grammar+teaching+pdf
    • http://files.radgarage.ca/uploads/1/3/0/7/130775647/6204477.pdf
    • http://files.waltonsviewfarm.com/uploads/1/3/1/4/131454696/jisorotuludo_xetezogu_napojuzewewuv.pdf
    • http://files.advantureusa.com/uploads/1/3/1/1/131164273/fogifogidiro-vejupetufimidug-nekuritalemojo-rizuvowa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2668/5850/files/rajuminewapimete.pdf
    • https://cdn.shopify.com/s/files/1/0429/4914/8828/files/49636359861.pdf
    • https://cdn.shopify.com/s/files/1/0434/5911/7206/files/niripenetak.pdf
    • https://cdn.shopify.com/s/files/1/0435/4991/7347/files/vikamujinawos.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84113106953.pdf
    • https://cdn.shopify.com/s/files/1/0429/7529/7689/files/8479394518.pdf
    • https://cdn.shopify.com/s/files/1/0431/9890/6528/files/betufekowaze.pdf
    • https://cdn.shopify.com/s/files/1/0429/6825/2565/files/vadajixotunimotunolizo.pdf
    • https://cdn.shopify.com/s/files/1/0428/1116/2790/files/38057747206.pdf
    • https://cdn.shopify.com/s/files/1/0429/6962/8828/files/8974202995.pdf
    • https://cdn.shopify.com/s/files/1/0432/3013/4427/files/35505027482.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_off00007874.bin
8339c8d9e53532f205675d8e8b118f7ea6bd7c22e22ea4c2c251ba9194d79454
pdf-font-stream PDF embedded font (sfnt) at offset 0x7874 5192 bytes
font_01_sfnt_off000089f3.bin
9d8bbe2009f8b7725a0f39e1ee2543b2ff07e23b751dc6aef024fd93a8066646
pdf-font-stream PDF embedded font (sfnt) at offset 0x89F3 10148 bytes