Malicious PDF — malware analysis report

Static analysis result for SHA-256 62060909842d20e2…

MALICIOUS

PDF

51.7 KB Created: 2020-08-14 05:24:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a2407a841acd45101c5c3deeacaf6d8 SHA-1: 178888484dd4d043e10e50606a4524157c640d63 SHA-256: 62060909842d20e259ca20868d3bb357bfcac9315edb4f3da9859c4df7307996
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm designed to manipulate search engine results. One critical heuristic identified a link to known malicious redirector infrastructure at `https://ttraff.ru/pify?keyword=gradle+tutorial+java+for+beginners+pdf`. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=gradle+tutorial+java+for+beginners+pdf
    • http://files.mmarshallchurch.com/uploads/1/3/0/8/130874655/jelizizufizafas.pdf
    • http://pudos.grahnforlang.com/uploads/1/3/1/4/131483281/3050848.pdf
    • http://nujis.cappuccinoandcompany.com/uploads/1/3/1/4/131407227/1134757.pdf
    • http://litawi.bolhousellc.com/uploads/1/3/1/3/131383483/kamowesi_dagavu_wekadufoxuwi_bugatakabubuf.pdf
    • http://resipulud.wildonwildlife.org/uploads/1/3/0/8/130814328/a6f555a714ba12.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/7264/3491/files/vosimibixewifox.pdf
    • https://cdn.shopify.com/s/files/1/0432/3042/9352/files/wallpaper_photo_app.pdf
    • https://cdn.shopify.com/s/files/1/0439/3595/7147/files/suwenenitul.pdf
    • https://cdn.shopify.com/s/files/1/0435/7108/5475/files/alcohol_and_diabetes.pdf
    • https://cdn.shopify.com/s/files/1/0433/3309/1496/files/pobafelodom.pdf
    • https://cdn.shopify.com/s/files/1/0432/4386/4228/files/11395825066.pdf
    • https://cdn.shopify.com/s/files/1/0438/4584/5152/files/92089838179.pdf
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/fikokilor.pdf
    • https://cdn.shopify.com/s/files/1/0433/4885/2891/files/lisozarewivobuwo.pdf
    • https://cdn.shopify.com/s/files/1/0436/9081/9739/files/sogifovonu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5290/0260/files/ceramic_materials_nptel.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006489.bin
24fd6868f187b5667792517f9f69d22ac5a3de5011d4d3824467392effeade79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6489 6588 bytes
font_01_sfnt_off00007503.bin
3074e13ac898fa4751dc68638af8da2440a216fbb56d7f0a7e494f3048ce165d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7503 5400 bytes
font_02_sfnt_off00008771.bin
cf50d13c5c21d2e34fba0d9dd21119d4839fc35fdaebfe62cbacf51850cc328d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8771 1936 bytes
font_03_sfnt_off000090af.bin
43857890f6cac483eaeddcdf872a2a09e0a35ff3b1e7844a04e5b41591ee7999		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90AF 9920 bytes
font_04_sfnt_off0000b2a0.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB2A0 4324 bytes

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