Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b7dc654fa7ac1a2…

MALICIOUS

PDF

56.0 KB Created: 2020-08-07 09:40:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6a61e4fe94f0525a3131f5604c94f904 SHA-1: c6b0d53f67c099515fc9eb330e7ad4b42346f2c4 SHA-256: 5b7dc654fa7ac1a2c5485bfde07a5f12cde900023bc67bcce2563feb82d4b2f5
194 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to a redirector service (ttraff.com) that is known to host malicious content. The document body and embedded links suggest a lure for academic-related content, likely a phishing or malware distribution scheme. The ML classifier also strongly indicated maliciousness.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.com/pify?keyword=makalah+energi+biomassa+pdf In PDF document text
    • http://pozurab.emeraldacresaldergrovebc.com/uploads/1/3/1/8/131856772/jupemojib-figovudizag-koronakirel.pdfIn PDF document text
    • http://files.walkamilebrainerdbaxter.com/uploads/1/3/2/7/132741322/depako.pdfIn PDF document text
    • http://files.nuplanetreestudent.com/uploads/1/3/1/3/131398144/xegasiz_pimegimokefini_xikejesi.pdfIn PDF document text
    • http://files.mrsramosvirleysartclass.com/uploads/1/3/0/8/130874120/turolodali_fivetemem_xapedonigapi_nexunure.pdfIn PDF document text
    • http://files.rootsdesignco.com/uploads/1/3/1/3/131398401/1255625.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4855/0050/files/88410641068.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9373/8143/files/55746889927.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4319/1969/files/kesuzazedufedajiluxorew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6229/5714/files/77536709763.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94229011204.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4615/1078/files/zareg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6341/9815/files/35242541713.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4021/0072/files/nedesotodabagamefu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5184/3733/files/zexepeguxuzomi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0636/0730/files/rukijepitilodajelewo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2331/8686/files/28233412670.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0041/4883/files/subosurujotawexavosu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5830/6965/files/13800509740.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_off00008f70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F70 5372 bytes
SHA-256: 142cc381ebf498a69eea5bc7d342900bfe9d8a0e619948e80941f513f3f6659f
font_01_sfnt_off0000a16f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA16F 10304 bytes
SHA-256: 1cdb4fe273bc3e1fcbf97e711c0e110a62a3c78e3ff7f49a475b40cc8f86f843
font_02_sfnt_off0000c491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC491 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378