Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ee34935a34cda91…

MALICIOUS

PDF

39.3 KB Created: 2020-08-23 01:16:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fffdc33bc6d17548b5d2ff081f09d803 SHA-1: 526f8d204406a3c21e8d2aef1a28689d16ee46fa SHA-256: 6ee34935a34cda916b1a3227b19ea12eac3e2830f3b2780fa37a5dc1fc1930c3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to link farms hosted on Shopify and other domains. One critical heuristic identified a link to a known malicious redirector infrastructure at `https://ttraff.ru/pify?keyword=meaning+of+rain+fell+in+sheets`. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same malicious URL and several benign-looking PDF links, suggesting a lure to a malicious site.

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=meaning+of+rain+fell+in+sheets
    • http://files.aroundthepros.com/uploads/1/3/0/8/130814769/guzujofawutef.pdf
    • http://files.rosedalecurriculum.com/uploads/1/3/1/1/131164460/farosi.pdf
    • http://renaza.toprodbassmasters.com/uploads/1/3/1/3/131398405/xanemojag-jumozenugop-kuboligiwi-dasaz.pdf
    • http://pomigo.householdarchaeology.org/uploads/1/3/0/7/130739777/puzaraxu_sevorij_baxibuxud_xezevekevox.pdf
    • http://vufuja.miniaques.com/uploads/1/3/1/6/131637814/wokumine.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8369/4247/files/jabisasanixevi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4729/5898/files/utorrent_app_install.pdf
    • https://cdn.shopify.com/s/files/1/0437/7506/6273/files/99496298476.pdf
    • https://cdn.shopify.com/s/files/1/0434/8801/8598/files/english_abc_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/79807552326.pdf
    • https://cdn.shopify.com/s/files/1/0436/6709/5705/files/91680638591.pdf
    • https://cdn.shopify.com/s/files/1/0433/9807/0435/files/95859590540.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jezimix.pdf
    • https://cdn.shopify.com/s/files/1/0439/0594/1672/files/fonevujadorotalibogadanel.pdf
    • https://cdn.shopify.com/s/files/1/0435/2222/8379/files/egerton_university_admission_letter.pdf
    • https://cdn.shopify.com/s/files/1/0428/3400/2086/files/tabegawiduxisiwaberoke.pdf
    • https://cdn.shopify.com/s/files/1/0428/8089/3084/files/gezowatironida.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_off00005d4d.bin
5a5a303b22b66f8b3c190b6765729355ced28586dad9086a75ffa419670500f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D4D 5032 bytes
font_01_sfnt_off00006e6a.bin
728ccd48e4e33f4f3255055cff766a85dc0fbed3d1ee04e446857a4faf6e7831		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E6A 9920 bytes

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