Malicious PDF — malware analysis report

Static analysis result for SHA-256 eba341bd1d06a899…

MALICIOUS

PDF

41.3 KB Created: 2020-10-24 19:29:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: cbd9d1a713fb7b1fc0fbc74b674f22d0 SHA-1: 9f94bfc46acaa32f3bfc5229ca7db10ab8703488 SHA-256: eba341bd1d06a89939b35e32260cef41790fe4ab64338f42c1a11c1ae24de88c
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to Weebly-hosted PDFs, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination. The document body, though heavily obfuscated, contains text related to research papers and includes the malicious URL, reinforcing the lure.

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.cc/pify?keyword=research+paper+example+apa+pdf In PDF document text
    • https://towetebofipu.weebly.com/uploads/1/3/1/4/131437669/jukonodinabekip_gibupobi_debagogavu_bewozuvawalalu.pdfIn PDF document text
    • https://soguleta.weebly.com/uploads/1/3/4/3/134305846/268d6347.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/foguxek_woxogonedifuk.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/7517590.pdfIn PDF document text
    • https://kemumapuvepuvi.weebly.com/uploads/1/3/4/3/134311950/2315159.pdfIn PDF document text
    • https://zotorakiv.weebly.com/uploads/1/3/0/7/130739478/felilif.pdfIn PDF document text
    • https://noxepelobisuse.weebly.com/uploads/1/3/1/8/131871648/9268a371000a5.pdfIn PDF document text
    • https://xogexemufak.weebly.com/uploads/1/3/1/4/131437987/bidowapiguxu.pdfIn PDF document text
    • https://xogexemufak.weebly.com/uploads/1/3/1/4/131437987/vegutafekopeberadan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365541/normal_5f86f8315c646.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370064/normal_5f917fbc82397.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/6657/0924/files/manifest_merger_failed_androidx.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5643/7665/files/android_turned_off_by_administrator_encryption_policy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/9022/9413/files/psychology_book_in_bengali.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/64191357848.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/xalibun.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/36506110450.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/jiguxarenuxedeseneziwoxu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6472 5468 bytes
SHA-256: 1fa4360f94cb184242c67a6719dd01fcf43251c5c2dfd7dd929b450b896647f1
font_01_sfnt_off000076ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76EC 9820 bytes
SHA-256: 517a74bc55c223cf4c07c5824f2ece4514e5cfaf6140b01765d3d3cbdba30eda

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