Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dce45f884310e18…

MALICIOUS

PDF

44.4 KB Created: 2020-10-26 17:00:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e6de499940595ed7f0c687853c794ff SHA-1: 7c6fb6ca0a4267bca60ae0c3fbab676f7e1bb1b9 SHA-256: 2dce45f884310e187a57422966a915b51581da7cf96fe6ed927ae360cac99c3d
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by an ML classifier and contains a critical heuristic firing for a malicious redirector link. The document body, though heavily obfuscated, contains text suggesting a lure for game hacks and includes the malicious URL. The presence of numerous external PDF links, many pointing to benign content, suggests a link farm or SEO manipulation tactic to host the malicious redirector.

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=online+games+hack+mod+apk+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/9d822fbd-f8eb-463c-900c-47e60ac5bb9c/chella_kutty_song_from_rajini_muruga.pdf
    • https://uploads.strikinglycdn.com/files/a8043676-f794-4c19-80e6-27af0546ffd1/jomotibemafesizomuzani.pdf
    • https://uploads.strikinglycdn.com/files/416487c9-f9ba-4301-a43b-7b3066e7f914/selling_building_partnerships.pdf
    • https://uploads.strikinglycdn.com/files/d03e92ec-c934-441d-9e6e-20facecf0696/mudeduvuligixugotunupa.pdf
    • https://uploads.strikinglycdn.com/files/97e02fa4-1523-4323-891e-1a962da113b7/46848724742.pdf
    • https://uploads.strikinglycdn.com/files/cb13f8c3-e422-45ad-9a9f-91648fa86de6/kisitosokagimonibuz.pdf
    • https://uploads.strikinglycdn.com/files/84fda9e6-53ad-4808-b703-b034e68e2e03/war_dragons_breeding_guide_2018_red.pdf
    • https://uploads.strikinglycdn.com/files/775b02cc-c528-48ff-aed5-765c96ac206c/tilofejuripazozoxusubipi.pdf
    • https://uploads.strikinglycdn.com/files/27d5b3ce-19de-4215-815b-e9f0094e0701/zofuriloguti.pdf
    • https://cdn.shopify.com/s/files/1/0499/2997/8018/files/42009065427.pdf
    • https://cdn.shopify.com/s/files/1/0437/2352/2216/files/corby_7700_pants_press_manual.pdf
    • https://cdn.shopify.com/s/files/1/0266/9484/4605/files/96926904812.pdf
    • https://cdn.shopify.com/s/files/1/0500/5328/4008/files/gumifi.pdf
    • https://uploads.strikinglycdn.com/files/830e748f-b348-45c7-ba2f-bf1ea2879b66/dikilufixerekopasifobi.pdf
    • https://uploads.strikinglycdn.com/files/95f3a491-8f68-43d5-9a6a-65e247416e25/kerstliedjes_tabs_en_teksten.pdf
    • https://uploads.strikinglycdn.com/files/cdad0e9a-3640-42a4-8a9d-8512a5674a40/kitanesutejenabisalavo.pdf
    • https://uploads.strikinglycdn.com/files/68840060-b708-4229-9cb5-9e041c305735/lukosiwajefiroj.pdf
    • https://uploads.strikinglycdn.com/files/ef545c4a-6fdc-4698-85c4-4796e62f436b/dinezi.pdf
    • https://uploads.strikinglycdn.com/files/89d908e1-2510-485e-bd92-07413b33b4e2/tewotexuta.pdf
    • https://s3.amazonaws.com/jolituzoji/caccini_le_nuove_musiche.pdf
    • https://s3.amazonaws.com/zuxadol/strength_training_program_for_beginners.pdf
    • https://s3.amazonaws.com/kavitokolezub/filoba.pdf
    • https://s3.amazonaws.com/susopuzupure/7050602570.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_off00006d0e.bin
03d04b33356a2b29848fd7bd930ecc472fb1aa68ded74211644cd405f4d5516f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D0E 5572 bytes
font_01_sfnt_off00007ff3.bin
2b91713c6c1436e77bd8e08378bba4eb0214955bc80fa66bedb215c2ef329e7a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF3 10608 bytes