Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f97629553e070d2…

MALICIOUS

PDF

45.6 KB Created: 2020-08-25 07:59:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6666143755e3a15b2d82505f3437f8bd SHA-1: 5eff58a2aae701d83afb283e6588090e60581130 SHA-256: 0f97629553e070d2c9926d83d5c4278628471a945ba8b93b63b71d7328a1b0f1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to SEO-optimized PDF files hosted on Shopify. One of these links, 'https://ttraff.com/pify?keyword=cause+and+effect+essay+outline+template+pdf', is identified as a known malicious redirector. This suggests the document is part of a link farm designed to drive traffic to malicious sites, likely 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.com/pify?keyword=cause+and+effect+essay+outline+template+pdf
    • http://files.aultmanorthopaedics.com/uploads/1/3/2/3/132303035/2db094dc05926.pdf
    • http://files.myanimaltags.com/uploads/1/3/0/7/130739809/jujenisoziwa_rewapemizaxomin_nukula_safasepabap.pdf
    • http://files.loblowsports.com/uploads/1/3/0/8/130813906/tekudunibik_dujeno_wapelujozoz.pdf
    • http://files.triggersawblade.com/uploads/1/3/2/7/132741302/wajirufo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/1756/6368/files/cost_accounting_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/3622/9277/files/wokodinawaneg.pdf
    • https://cdn.shopify.com/s/files/1/0431/3337/0522/files/kanupalowimu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5049/9222/files/xizowozerisasebidege.pdf
    • https://cdn.shopify.com/s/files/1/0439/9264/5790/files/airline_alliances.pdf
    • https://cdn.shopify.com/s/files/1/0428/1863/3894/files/12098213052.pdf
    • https://cdn.shopify.com/s/files/1/0429/7595/3049/files/55973141530.pdf
    • https://cdn.shopify.com/s/files/1/0431/0299/4586/files/yt_www_watchqueue_loadthumbnails.pdf
    • https://cdn.shopify.com/s/files/1/0434/6285/2761/files/pefiwogelurudazasesexeku.pdf
    • https://cdn.shopify.com/s/files/1/0432/3665/5259/files/6657317668.pdf
    • https://cdn.shopify.com/s/files/1/0431/6545/0389/files/19203306113.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_off000075a9.bin
173a232bd9af2acb7c8021948ea70b9f34f3bdb744caa65f8abb635c693e6880
pdf-font-stream PDF embedded font (sfnt) at offset 0x75A9 5212 bytes
font_01_sfnt_off00008760.bin
598b92f80f4bf01eee81d51cb5a3cb1351d3691f37098e4e1aec37c752fe2e34
pdf-font-stream PDF embedded font (sfnt) at offset 0x8760 9964 bytes