Malicious PDF — malware analysis report

Static analysis result for SHA-256 868a148694a2b30d…

MALICIOUS

PDF

41.0 KB Created: 2020-11-03 05:31:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d16fd3bb8961ab1af9d20ee70260f356 SHA-1: 585a56f92e898898ce851cc715b7e596dac756d8 SHA-256: 868a148694a2b30db9e8d85ad466d6d6c36d8c382ff729c5c2acf4c8a4fd71c2
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, identified as malicious. It also hosts a large number of external PDF links, many of which are benign, suggesting a link farm or SEO poisoning attempt. The document body, while heavily obfuscated, contains the malicious URL and other PDF links, indicating an attempt to drive traffic to potentially harmful content.

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.ru/123?keyword=ncaa+fayetteville+regional+baseball+bracket
    • https://pufotawimudob.weebly.com/uploads/1/3/4/3/134380049/zobilawijejulud.pdf
    • https://cdn-cms.f-static.net/uploads/4369777/normal_5f95568441cf5.pdf
    • https://bonifivudinuf.weebly.com/uploads/1/3/4/3/134305406/juxilala-pazapib-pabazanexe.pdf
    • https://cdn-cms.f-static.net/uploads/4365620/normal_5f968b7cdc5bb.pdf
    • https://xukaxikerebata.weebly.com/uploads/1/3/4/0/134042698/serividez-dovafubimusuku.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0499/7536/1688/files/accounting_chapter_4_study_guide_true_and_false.pdf
    • https://s3.amazonaws.com/fomaralunex/2637246737.pdf
    • https://s3.amazonaws.com/vibuvomomuv/zoron.pdf
    • https://s3.amazonaws.com/guwutivupudutu/foothill_middle_school_azusa_calendar.pdf
    • https://s3.amazonaws.com/vabemavuputenif/23928068582.pdf
    • https://uploads.strikinglycdn.com/files/d2f261ab-e2b5-4b17-9cfd-ba7465c74bf3/95097890984.pdf
    • https://s3.amazonaws.com/jamokaroxoj/74261805622.pdf
    • https://cdn.shopify.com/s/files/1/0483/5724/5077/files/14683569934.pdf
    • https://uploads.strikinglycdn.com/files/7a9b57bd-ad20-49cd-acdc-e10324d84b6f/luxuvujuwujolege.pdf
    • https://cdn.shopify.com/s/files/1/0497/9346/6517/files/nutopebepifede.pdf
    • https://cdn.shopify.com/s/files/1/0432/2453/1101/files/jodeviw.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ff8.bin
edc5b628888099d92d345ab2376a860da1fa439c7e0372d956e45415f616da37
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF8 5384 bytes
font_01_sfnt_off00007278.bin
784358a7375cad44b664a506e9b42ab6c80be0d9e7ad0b0f99be59c13a33f54f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7278 10868 bytes