Malicious PDF — malware analysis report

Static analysis result for SHA-256 45958063be898d21…

MALICIOUS

PDF

64.1 KB Created: 2020-10-25 09:29:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cacbb42e1b93e66cea2664bb2853ad2f SHA-1: 8035a7fee23a1083d84967c947081fa4551e5195 SHA-256: 45958063be898d2165ae4dbe17da5fc8e454d18ae3967762719d14d724225889
174 Risk Score

Malware Insights

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

The PDF contains a link to a redirector infrastructure that is known to host malicious content, specifically directing users to download an application. The document body and embedded links also point to a large number of external PDF files, suggesting a link farm or SEO poisoning attempt. The presence of a malicious redirector URL and the link farm activity strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.club/123?keyword=download+callapp+contacts+premium+apk
    • https://dopuxaponaxu.weebly.com/uploads/1/3/2/6/132695391/9c8a6d23.pdf
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/bonirisima.pdf
    • https://vafumigoku.weebly.com/uploads/1/3/1/3/131384305/naxikezomafizaw.pdf
    • https://nupureforisuro.weebly.com/uploads/1/3/4/3/134353583/bc8cafcd3f7c78.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0492/7179/9964/files/fubomexifexivuvoxolumuvip.pdf
    • https://cdn.shopify.com/s/files/1/0499/3253/3922/files/wofilo.pdf
    • https://cdn.shopify.com/s/files/1/0500/1068/5600/files/zudefu.pdf
    • https://uploads.strikinglycdn.com/files/f0e3c0c9-d66f-42b8-b8bd-cd493ff598a2/dj_luke_nasty_highway_music_stuck_in_traffic_zip.pdf
    • https://uploads.strikinglycdn.com/files/ce54ce7e-1a74-4c75-8da3-ca894629db8e/22671665181.pdf
    • https://s3.amazonaws.com/levumoduf/asme_pcc_1_2018_free_download.pdf
    • https://s3.amazonaws.com/henghuili-files2/36858717582.pdf
    • https://s3.amazonaws.com/sowewazulejewi/deductive_approach_and_inductive_approach.pdf
    • https://s3.amazonaws.com/bakoloj/gotitixizogifimoxupidur.pdf
    • https://s3.amazonaws.com/memul/92825574347.pdf
    • https://uploads.strikinglycdn.com/files/9695b448-69d4-4c08-9fdb-ac85dc9c82f0/xuxuzalojakojivupelajewam.pdf
    • https://uploads.strikinglycdn.com/files/eef31372-a41b-49d5-8e20-9cf670920a55/resiwe.pdf
    • https://s3.amazonaws.com/salade/36891517546.pdf
    • https://s3.amazonaws.com/pazifetanegapu/74931006968.pdf
    • https://s3.amazonaws.com/tadovu/wixakejumigisekomi.pdf
    • https://s3.amazonaws.com/pazifetanegapu/49236586662.pdf
    • https://s3.amazonaws.com/kavitokolezub/29077799328.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a0f7.bin
0b41ffd8d063bfe3fb021401f6f075d6b7bea6757a2dc5dec667631a02d4cf95		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0F7 5376 bytes
font_01_sfnt_off0000b340.bin
3dde783f7b893d6ed5ad51892cf15a1ab6cd8aa6f03dddbc74e459ba683af50f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB340 12988 bytes
font_02_sfnt_off0000dcce.bin
39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCE 16092 bytes

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