Malicious PDF — malware analysis report

Static analysis result for SHA-256 1587468355b286db…

MALICIOUS

PDF

65.9 KB Created: 2020-10-27 04:43:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9578122937b5a566508adec6f4d042a2 SHA-1: 14ee20016af0fae0c5334190fc52c8538f8b11d2 SHA-256: 1587468355b286dbdd1e5f80f58842fb9ff68942bdd44c3507ddd5e1bcb4ca72
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic indicating it links to known malicious redirector infrastructure, specifically `https://gettraff.ru/strik?keyword=export+apk+android+studio`. Another critical heuristic flags it as a recovery secret lure, requesting sensitive information. The document body, though heavily obfuscated, contains the same URL, suggesting the primary purpose is to direct users to a potentially malicious site for credential harvesting or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://gettraff.ru/strik?keyword=export+apk+android+studio
    • https://cdn-cms.f-static.net/uploads/4366335/normal_5f87116c1fbde.pdf
    • https://cdn-cms.f-static.net/uploads/4379606/normal_5f8ef881817cb.pdf
    • https://cdn-cms.f-static.net/uploads/4366327/normal_5f88f437dd7dc.pdf
    • https://cdn-cms.f-static.net/uploads/4368742/normal_5f87da0bc3da6.pdf
    • https://cdn-cms.f-static.net/uploads/4402501/normal_5f953d329ffdf.pdf
    • https://velabusodogir.weebly.com/uploads/1/3/1/8/131858366/2b223c9cc89e0.pdf
    • https://xikosenazegan.weebly.com/uploads/1/3/0/7/130739601/85745c1d4419.pdf
    • https://legadiduzavof.weebly.com/uploads/1/3/2/6/132681829/1425314.pdf
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/9f0f71ba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0497/5362/0634/files/elastic_spring_force_formula.pdf
    • https://cdn.shopify.com/s/files/1/0501/6223/7621/files/89154818723.pdf
    • https://cdn.shopify.com/s/files/1/0478/2329/0527/files/wifotujale.pdf
    • https://uploads.strikinglycdn.com/files/ad392bb3-76c9-414b-b197-a1c61929ab8a/25065789502.pdf
    • https://uploads.strikinglycdn.com/files/2224a2d0-5dbe-44b8-b3c6-b14178fe5283/tifezedirinokanago.pdf
    • https://uploads.strikinglycdn.com/files/7e05d9ce-72c4-422e-8272-9836cd41d51d/rifexopotovogolapes.pdf
    • https://cdn.shopify.com/s/files/1/0468/0253/4551/files/50945213290.pdf
    • https://cdn.shopify.com/s/files/1/0482/0126/9405/files/django_2_by_example_github.pdf
    • https://uploads.strikinglycdn.com/files/fa05aad3-edcc-44aa-9334-5ec3b3d6ac55/pezulutozirudogeji.pdf
    • https://uploads.strikinglycdn.com/files/077b7c9c-40b5-493b-a59c-d06b0636192f/39541539401.pdf
    • https://uploads.strikinglycdn.com/files/c7dcac28-e42c-4a3e-984b-ecc5604b7419/fivanujisakatax.pdf
    • https://uploads.strikinglycdn.com/files/a4378c73-63e6-43fe-aadd-eb0a73557856/26181374809.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_off0000b50f.bin
875f909d84e60db90a9cc1c5e0df56db55a0ee6ecc35d350f15344330b8bc83e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB50F 4772 bytes
font_01_sfnt_off0000c545.bin
ee924ad7cbced35a94b5432ce8ac820431d0b15857b44f9f433023b1d0759f4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC545 11444 bytes
font_02_sfnt_off0000ec09.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC09 4324 bytes

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