Malicious PDF — malware analysis report

Static analysis result for SHA-256 700e28fa0453afca…

MALICIOUS

PDF

49.3 KB Created: 2020-07-28 06:53:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1fb52f50bbd48497757225c930984140 SHA-1: fa4b60212565344f3a1eefc3295a0357b50561db SHA-256: 700e28fa0453afca1dc1298b7436ca728d130bef09f22f3310f4edf22d8cd53b
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 the primary URL `https://ttraff.cc/pify?keyword=alternating+current+numericals+pdf` identified as a malicious redirector. This suggests the document's purpose is to lure users to malicious sites, likely for phishing or to download further malware. The ML classifier strongly supports the malicious nature of this PDF.

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=alternating+current+numericals+pdf
    • http://files.crainbrosinc.com/uploads/1/3/0/7/130775728/868342d6d.pdf
    • http://files.schec.net/uploads/1/3/1/8/131871894/6851944.pdf
    • http://files.hoffmannlabradors.com/uploads/1/3/0/7/130740073/sizogapijapuxomuxex.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8914/9608/files/36722650015.pdf
    • https://cdn.shopify.com/s/files/1/0432/6385/2708/files/zidegosagakidakopemobo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4715/7911/files/79240791888.pdf
    • https://cdn.shopify.com/s/files/1/0435/0545/1160/files/fonufagagemabejikuwomaliz.pdf
    • https://cdn.shopify.com/s/files/1/0431/2019/7789/files/3492929582.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8864/files/rovevavoxonedajiji.pdf
    • https://cdn.shopify.com/s/files/1/0430/2117/2897/files/midoz.pdf
    • https://cdn.shopify.com/s/files/1/0435/5797/8273/files/49340413104.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/29435640588.pdf
    • https://cdn.shopify.com/s/files/1/0431/0627/1394/files/3607327622.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52733892229.pdf
    • https://cdn.shopify.com/s/files/1/0432/8862/5316/files/42840620915.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_off00008269.bin
76fc476288b0e9479f5331dcbfc1b6a9be1667bbb1f3cfabf5df3b3c26e086cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x8269 5236 bytes
font_01_sfnt_off00009416.bin
bc675d912a4dcba2acdc14115a8cff265fa652a13d239b9ee1d105a4e0378584
pdf-font-stream PDF embedded font (sfnt) at offset 0x9416 10528 bytes