Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ccc16419a24e9b5…

MALICIOUS

PDF

42.6 KB Created: 2020-08-15 01:19:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bebb3610e45c341fad3f2f8cc5294bd SHA-1: 725f3fdf4da20fc056ad69e41d7bf3c0547b0ce1 SHA-256: 0ccc16419a24e9b5840a41ba9acebb1222a69329767400ef4b6e8b5f4006753b
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one heuristic specifically identifying it as a PDF link farm. The primary malicious URL, 'https://ttraff.ru/wb?keyword=bespoke%20software%20pdf', is flagged as a malicious redirector. While no scripts were extracted, the sheer volume of links and the malicious redirector suggest an attempt to drive traffic to malicious sites, potentially for phishing or malware distribution.

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/wb?keyword=bespoke%20software%20pdf
    • http://gebitaxa.germanscalzo.com/uploads/1/3/1/8/131857247/3096143.pdf
    • http://files.ldbellsoccer.com/uploads/1/3/1/6/131636689/dcc49486.pdf
    • http://bopowinin.fincascoffee.com/uploads/1/3/0/7/130775934/d921178c7.pdf
    • http://files.ibew23.org/uploads/1/3/0/7/130775952/491866.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0443/0161/5260/files/fusionner_2_avec_adobe_reader_xi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9165/6855/files/ak_47_gungeon.pdf
    • https://cdn.shopify.com/s/files/1/0432/3603/2680/files/61158537071.pdf
    • https://cdn.shopify.com/s/files/1/0431/8950/2110/files/97076488022.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9475/files/basic_electronics_mcqs.pdf
    • https://cdn.shopify.com/s/files/1/0427/7298/8071/files/wedafaso.pdf
    • https://cdn.shopify.com/s/files/1/0431/6993/9612/files/ziboni.pdf
    • https://cdn.shopify.com/s/files/1/0431/5286/7494/files/99646542283.pdf
    • https://cdn.shopify.com/s/files/1/0430/9726/0192/files/factorio_train_blueprint_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/6355/8815/files/saramozimewozibev.pdf
    • https://cdn.shopify.com/s/files/1/0429/3240/4380/files/bunomorefebavasizuv.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_off00005d16.bin
a1c639218cc7200582430aea3ba14d6bd5849f58bab41fae5308c3360c84c7d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D16 4844 bytes
font_01_sfnt_off00006daf.bin
f80c004027ae37e855458203b2c4bf593b981bd857a48162fd5c5ef13a0bea6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DAF 9996 bytes
font_02_sfnt_off00008fca.bin
ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FCA 4324 bytes

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