Malicious PDF — malware analysis report

Static analysis result for SHA-256 60be353b4b107ddd…

MALICIOUS

PDF

42.4 KB Created: 2020-08-26 08:39:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4bdfd9fbbd40253750acfd4ba5d7b92e SHA-1: 238b41c43a9be29e0382fc79e37768a067096a0a SHA-256: 60be353b4b107ddd7555d71c38e9541a38f996e27aa9861f86f38be70bc42c1f
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical redirector link pointing to malicious infrastructure. The document body, though heavily corrupted, contains the same URL as the redirector, suggesting an attempt to lure users to a malicious site. The ML classifier also strongly indicated maliciousness.

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=ingilizce+t%25C3%25BCrk%25C3%25A7e+hikayeler+kitap
    • http://widug.grandparentsforsocialaction.org/uploads/1/3/1/0/131071164/sojamekojafe.pdf
    • http://files.londonputtingacademy.com/uploads/1/3/0/7/130739093/45177815f5caba.pdf
    • http://files.richardkirby.org/uploads/1/3/1/4/131438658/niwigoje.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/9444/2133/files/wofekerus.pdf
    • https://cdn.shopify.com/s/files/1/0433/4714/8950/files/post_nuptial_agreement_template_uk.pdf
    • https://cdn.shopify.com/s/files/1/0428/4760/0796/files/tetekurobadozenofomilas.pdf
    • https://cdn.shopify.com/s/files/1/0430/5921/6533/files/34499106299.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/cantos_liturgicos_para_misa.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/43843424599.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bibekejufalakudogaloseja.pdf
    • https://cdn.shopify.com/s/files/1/0436/9596/4328/files/13245423330.pdf
    • https://cdn.shopify.com/s/files/1/0433/8748/6358/files/jisoguvasu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6895/6578/files/begin_the_beguine_artie_shaw.pdf
    • https://cdn.shopify.com/s/files/1/0448/3589/7505/files/gta_4_mod_menu.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_off000056a9.bin
f2d2b1a5584945d06ffc1e6cae68ce481258b77c3782b7e413b3caa4078287ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x56A9 5148 bytes
font_01_sfnt_off000067eb.bin
cd6a7f227f3ad9deda098e52cdac87684523291178584c2f3a1a133b3339c837
pdf-font-stream PDF embedded font (sfnt) at offset 0x67EB 11696 bytes
font_02_sfnt_off00008c4d.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C4D 4324 bytes