Malicious PDF — malware analysis report

Static analysis result for SHA-256 7740f8ceeff8d088…

MALICIOUS

PDF

61.0 KB Created: 2020-08-14 01:35:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a63c4700fb7e24d9ad246f93c0e72b25 SHA-1: c6d73acbf48b481844f87b7d100509b0ba234185 SHA-256: 7740f8ceeff8d088a48afe9d9ae183053744b5c15d272eb7a64a784fbdc1f2b8
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector at 'https://ttraff.ru/pify?keyword=abituriyent+jurnali+2019+pdf'. The document body, though heavily obfuscated, contains text suggesting it is an 'Abituriyent jurnali 2019 pdf', indicating a lure to disguise malicious intent. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute 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=abituriyent+jurnali+2019+pdf
    • http://files.atlasmountaineering.co.uk/uploads/1/3/0/7/130775866/2374681.pdf
    • http://files.makingmontevallo.com/uploads/1/3/0/7/130740458/86bb53dfde4e6e.pdf
    • http://files.emsactors.com/uploads/1/3/1/1/131164202/kaxijum.pdf
    • http://zugozipet.surreybulldogs.com/uploads/1/3/1/4/131409090/tuvegibuxe_raminawemafiz_forawobobezaj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/8886/2622/files/radeon_pro_5500m.pdf
    • https://cdn.shopify.com/s/files/1/0435/4090/6143/files/btec_sport_and_exercise_science_level_3_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/1057/9865/files/62078123771.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9560/files/58026070287.pdf
    • https://cdn.shopify.com/s/files/1/0432/5621/7750/files/divorce_in_islam_in_urdu.pdf
    • http://tuwujuwu.theraleighwineshop.square.site/uploads/1/3/0/8/130874474/16ae379ab9d9e.pdf
    • https://cdn.shopify.com/s/files/1/0437/8161/9861/files/91525302320.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8864/files/fixogixagemujowo.pdf
    • https://cdn.shopify.com/s/files/1/0429/4872/2851/files/62264485653.pdf
    • https://cdn.shopify.com/s/files/1/0430/0183/9775/files/sopivuxevupilofizosalowe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0805/6740/files/xadewatulefikutabusad.pdf
    • https://cdn.shopify.com/s/files/1/0431/2023/0564/files/chromosome_aberration.pdf
    • https://cdn.shopify.com/s/files/1/0440/9946/9464/files/68446201235.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_off0000950e.bin
26c91e28b572d4aae0f1dce97c42053417ed43a6285de8f0ecf82e658ef36d4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x950E 5416 bytes
font_01_sfnt_off0000a787.bin
903562abb7905f3d8af63dcd20a5248d7f983d437f368ebeb2ddada1b2bf6890		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA787 16204 bytes
font_02_sfnt_off0000d6c6.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C6 4324 bytes

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