Malicious PDF — malware analysis report

Static analysis result for SHA-256 67428d81baae733a…

MALICIOUS

PDF

41.7 KB Created: 2020-08-05 18:06:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc318934e66ea737dc069208e9560594 SHA-1: 308f3d95a152310360746e7fc12583d4ba29327c SHA-256: 67428d81baae733a05b2536bfc3e279d0d7d5327f79aad858bb202873c99bebf
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, traff.ru, which is likely intended to lead the user to further malicious content. The document body, though heavily obfuscated, contains the same URL and appears to be a lure for a 'blepharitis treatment pdf'. The presence of numerous external PDF links suggests a link farm or SEO manipulation tactic.

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=blepharitis+treatment+pdf
    • http://files.reddingfashionalliance.org/uploads/1/3/1/4/131406390/tenevavozumululive.pdf
    • http://files.bourbeau-voice-dynamics.com/uploads/1/3/1/3/131380934/2165398.pdf
    • http://files.ptbomassage.com/uploads/1/3/0/8/130814676/lejilamuvakili-pomefofite-rugoxikiw-kuzibox.pdf
    • http://files.dorebowen.com/uploads/1/3/1/6/131607174/3994866.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0445/9554/4228/files/mestrenova_license_file_crack.pdf
    • https://cdn.shopify.com/s/files/1/0430/9732/5732/files/memobojuzipibobekiloduva.pdf
    • https://cdn.shopify.com/s/files/1/0433/6753/0657/files/farexigelezubopowixur.pdf
    • https://cdn.shopify.com/s/files/1/0430/6383/6834/files/70605599863.pdf
    • https://cdn.shopify.com/s/files/1/0436/4884/3929/files/ansible_full_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0433/6871/0300/files/rusivikerasizusipaxuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/7760/7324/files/57621223163.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/28603075132.pdf
    • https://cdn.shopify.com/s/files/1/0437/0599/1322/files/somewhere_over_the_rainbow_chords_judy_garland.pdf
    • https://cdn.shopify.com/s/files/1/0435/4739/4199/files/atkins_physical_chemistry_10th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81988232477.pdf
    • https://cdn.shopify.com/s/files/1/0433/8011/3562/files/final_accounts_format.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_off0000656d.bin
2c7967c339238d269e1719faea15913fdd42016e63f9e945adb7da4c5802f4ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x656D 5328 bytes
font_01_sfnt_off00007760.bin
f30f2f35d86fb752417cf11a2d420fb704209a4d647eda83a8a990036e2d27ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7760 10144 bytes

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