Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fd4f34dc9a0183a…

MALICIOUS

PDF

47.1 KB Created: 2020-10-28 08:53:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d2ad0925dca71f2fd323a508896949af SHA-1: 2b9a33395f5b3ec04f32678acf781c9b943c9029 SHA-256: 8fd4f34dc9a0183adb59c293280aa0dece94867f7185fb5e17163c066eb10430
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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.me/123?keyword=fire+emblem+sacred+stones+rom+emuparadise In PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/sijuwoxujupid.pdfIn PDF document text
    • https://vunixumo.weebly.com/uploads/1/3/1/4/131453253/47df3d232c22a.pdfIn PDF document text
    • https://jubunukaf.weebly.com/uploads/1/3/1/4/131483214/8278019.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/8420088.pdfIn PDF document text
    • https://tudasuli.weebly.com/uploads/1/3/4/4/134403402/risanope.pdfIn PDF document text
    • https://pezopipowom.weebly.com/uploads/1/3/1/4/131406060/0836a99b806b04.pdfIn PDF document text
    • https://saxexowiki.weebly.com/uploads/1/3/0/9/130969873/vurep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/patogenesis_bronkiektasis.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/befiturudogagovifuvaluna.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/kindergarten_phonics_worksheets_beginning_sounds.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/wemapiwakokevevizanepumo.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/37919257153.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5520/4520/files/proportions_and_similar_figures_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8332/4320/files/rekawolepuzojod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9889/0150/files/headspace_3.9.1_mod_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8812/4830/files/uno_mod_apk_latest_version.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2907/2552/files/47421486335.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2286/6837/files/ponarugerosubelipezobajek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2825/0781/files/47717580796.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/fadiv.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/83053230150.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/78422601561.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/pemojo.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/86020567168.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6690 5452 bytes
SHA-256: 28c15c59ffbc1e4169ad613400d11a74f7d61fb354d0db67dfc31b385cf4d1c1
font_01_sfnt_off0000798a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x798A 5312 bytes
SHA-256: ef8f0947416cdc09599c0343e05613647dd2aa99068dcbcf0d3d4fbfa97b4209
font_02_sfnt_off00008b6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B6F 10236 bytes
SHA-256: ced4e866948b001c732b17d32a99f33c47b7b4e4c9d4febb41f79d139dfb7913

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