Malicious PDF — malware analysis report

Static analysis result for SHA-256 d254b47e00752004…

MALICIOUS

PDF

42.4 KB Created: 2020-08-15 07:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d11f4a8bdf94da61eb53cdc0ff1b2793 SHA-1: 95c31794b383b154ec5e4fdea56cc42eec915c7a SHA-256: d254b47e00752004710e8303931a6de9a43d3ad219e5653d6b170e71d491239c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a high density of external links, many pointing to domains associated with link farms and redirectors, such as ttraff.com. The ML classifier strongly indicated maliciousness, and the presence of numerous links suggests an attempt to direct users to potentially harmful content, possibly for phishing or malware distribution. No scripts were extracted, but the PDF structure itself is the delivery mechanism.

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=carbonate+ion+formal+charge
    • http://febomina.ktdidcollections.com/uploads/1/3/1/3/131380213/dunevabip_vonotabosasalib_gumufofibago_vugenubilabomo.pdf
    • http://sijime.msmohp.org/uploads/1/3/1/8/131871674/jeraje-webitewanedav-kadujorijeruxa.pdf
    • http://files.leadershipacademyutah.com/uploads/1/3/1/6/131606603/riwuma-ninikipudigaw-dajupi-gokusaniv.pdf
    • https://cdn.shopify.com/s/files/1/0436/9835/6392/files/14382279402.pdf
    • https://cdn.shopify.com/s/files/1/0430/3749/1354/files/61533513815.pdf
    • https://cdn.shopify.com/s/files/1/0448/3465/2321/files/franchising_as_a_market_entry_strategy.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rofimoluxita.pdf
    • https://cdn.shopify.com/s/files/1/0431/3799/0813/files/compounds_containing_nitrogen_notes.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/77439678162.pdf
    • https://cdn.shopify.com/s/files/1/0440/9769/9992/files/gojedozavobizigeziwadisex.pdf
    • https://cdn.shopify.com/s/files/1/0432/8580/7268/files/4640294731.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kilezibuvi.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000678a.bin
34930612de9f1cac45b8206c16a204ac9157c389c94dcee770ecf8ea927362a9
pdf-font-stream PDF embedded font (sfnt) at offset 0x678A 5164 bytes
font_01_sfnt_off000078f7.bin
0e1dc3107eb1e28221ca91a73c2059e1a702110c506b761fb2ad73d547788729
pdf-font-stream PDF embedded font (sfnt) at offset 0x78F7 10672 bytes