Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b275766034a888a…

MALICIOUS

PDF

74.2 KB Created: 2020-08-02 22:02:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dfd89ae8755b31001a8259e77da82162 SHA-1: a1ee1916f4f66fe1d1dce9de9dab12cf207993ee SHA-256: 7b275766034a888ac29c9aef95cbae3db95b15c4ec852e0aca0b64ab3e8ac1fe
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.cc'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to Shopify-hosted PDFs. The embedded URL 'https://ttraff.cc/pify?keyword=is+0+a+multiple+of+3' is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware distribution 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=is+0+a+multiple+of+3
    • http://files.cwscout.com/uploads/1/3/1/4/131438891/pumojoz_sigixotofubese_badedonekuso.pdf
    • http://files.tomsolaribuilder.com/uploads/1/3/1/4/131437157/jabunerod-zugefibesemer-govod-luvegigagomozaf.pdf
    • http://files.bookcellarlwonline.com/uploads/1/3/1/8/131860787/xejapami.pdf
    • http://files.kayibmaedesigns.com/uploads/1/3/1/6/131636725/166a1008811766.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/6208/4262/files/92780824742.pdf
    • https://cdn.shopify.com/s/files/1/0430/4971/3817/files/firaneduguma.pdf
    • https://cdn.shopify.com/s/files/1/0439/7678/6078/files/duvoxijebi.pdf
    • https://cdn.shopify.com/s/files/1/0430/1760/1181/files/42763754908.pdf
    • https://cdn.shopify.com/s/files/1/0435/3848/1311/files/ramusexawuzimanulami.pdf
    • https://cdn.shopify.com/s/files/1/0430/0832/7829/files/woxekedipavu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5808/6559/files/gedosabevipanavukagenoki.pdf
    • https://cdn.shopify.com/s/files/1/0433/7077/4677/files/migoxejezigemodivesoxalo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4916/4705/files/57314262220.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6509/files/fasadefibojonezerugadelad.pdf
    • https://cdn.shopify.com/s/files/1/0432/7302/7749/files/34934294744.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_off0000d912.bin
5f1f5c0a5c7fb062f6422bfaa032df7c8cfe95ebe88d1c31473c31f17233e633		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD912 4972 bytes
font_01_sfnt_off0000ea04.bin
0506cfbb3fc8b3a06dc931ea9b927440a14d311bc906d1d42cb74522e8ba803f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA04 10452 bytes
font_02_sfnt_off00010d9e.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9E 4324 bytes

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