Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d50e6f316a3401d…

MALICIOUS

PDF

44.6 KB Created: 2020-08-07 01:03:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e1be4a5ed52b4d280187dd9fe3db87c SHA-1: c23380b8579ca263b3fc22a0dc18169e51cb5c65 SHA-256: 0d50e6f316a3401daeee89913a8461a6b0123073b99a1138e58c6b7b3a3a7f3f
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious redirector infrastructure. The ML classifier strongly indicated maliciousness. The document body and embedded links suggest an attempt to drive traffic to a link farm, likely for SEO manipulation or to host further malicious content.

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=liquid+waste+management+system+pdf
    • http://lagige.art-of-rude.com/uploads/1/3/2/6/132695306/miwojasu_zobok_digamagekonig.pdf
    • http://mumalo.assiniboiaartscouncil.ca/uploads/1/3/1/0/131069839/gapaf.pdf
    • http://files.cambridgecharityfundraisers.com/uploads/1/3/0/8/130874474/kefiwuvi_zigane_kotopiwep_wakazomaxurepab.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6559/8364/files/scholarly_definition_of_development.pdf
    • https://cdn.shopify.com/s/files/1/0434/4361/7948/files/free_fillable_ub_04_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/bash_increment_variable.pdf
    • https://cdn.shopify.com/s/files/1/0431/5817/5906/files/35771805387.pdf
    • https://cdn.shopify.com/s/files/1/0431/4490/4865/files/pokemon_platinum_rare_candy_cheat.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/75954597273.pdf
    • https://cdn.shopify.com/s/files/1/0428/6644/2406/files/fukotapigovaporasux.pdf
    • https://cdn.shopify.com/s/files/1/0428/7466/7164/files/kafeti.pdf
    • https://cdn.shopify.com/s/files/1/0430/9316/4181/files/kazugitobotulategenaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/17958453685.pdf
    • https://cdn.shopify.com/s/files/1/0432/6824/3624/files/surah_ar_rahman_in_english_text.pdf
    • https://cdn.shopify.com/s/files/1/0433/7968/7574/files/mikes_rpg_center.pdf
    • https://cdn.shopify.com/s/files/1/0431/5247/4267/files/ccrn_study_guide_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/2696/3865/files/minecraft_gameboy_advance.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_off00006c5e.bin
797647185eb01fddf20cf25196410fbbbba2734244ecbf63a5f6cdf1cda16f8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C5E 5496 bytes
font_01_sfnt_off00007f1d.bin
34862ab665e67e04bfcaa0bcd24816e3fee09a15563cdeab9711df42969022ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F1D 11324 bytes

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