Malicious PDF — malware analysis report

Static analysis result for SHA-256 acbe68ce119a7fb2…

MALICIOUS

PDF

39.6 KB Created: 2020-10-31 22:09:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40cb193e466c958ddb07443ca5bea23c SHA-1: bf7f904c4e60a3f6dc6bffd7b6abff575f40b226 SHA-256: acbe68ce119a7fb220a77c6596044745012be57cc19452ba8a8512c3634e3362
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one identified as a malicious redirector. The document body, though partially obfuscated, includes the malicious URL and references a game, suggesting a lure to a malicious site. The presence of numerous links, many pointing to benign PDFs, indicates a link farm strategy, likely to obscure 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.me/123?keyword=mrs+pacman+online+unblocked
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0484/7855/2218/files/climemet_cm7048_user_manual.pdf
    • https://s3.amazonaws.com/bikikanafopavu/rixoribuwogigib.pdf
    • https://s3.amazonaws.com/rawesaragegugar/township_game_tips_2020.pdf
    • https://cdn.shopify.com/s/files/1/0502/5175/9771/files/roblox_sharkbite_bait.pdf
    • https://uploads.strikinglycdn.com/files/52f3c150-dbb7-4e6b-a638-c3b02f5ee02f/6970238373.pdf
    • https://cdn.shopify.com/s/files/1/0504/7156/7513/files/vodogogiveforotalavetesun.pdf
    • https://s3.amazonaws.com/solonebosop/59593104191.pdf
    • https://uploads.strikinglycdn.com/files/d2c47421-034a-4040-857e-d6e450217f4a/agave_hair_treatment_near_me.pdf
    • https://cdn.shopify.com/s/files/1/0479/3591/4140/files/91867423902.pdf
    • https://s3.amazonaws.com/rekibedafowow/birds_with_long_beaks_in_wisconsin.pdf
    • https://uploads.strikinglycdn.com/files/822aba0e-9628-4f19-b747-60cab7897077/pogepoduxiwariwude.pdf
    • https://s3.amazonaws.com/jukezeluf/busotekejazafoxegiwufip.pdf
    • https://cdn.shopify.com/s/files/1/0266/8914/2968/files/lipoxitoret.pdf
    • https://cdn.shopify.com/s/files/1/0487/9849/8981/files/53997631428.pdf
    • https://uploads.strikinglycdn.com/files/a7664d28-45c1-4ba1-ad00-52076c717099/the_figure_represents_the_overhead_view_of_a_deck.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_off00005b26.bin
0c2adc248fb4e965f0e2ccacd435e2d63c70f0c828821b3b2fb8d80eeb6b4e04
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B26 5428 bytes
font_01_sfnt_off00006d86.bin
a56d5d5c71df9424ff2c9823625b0d8fb16499a7f5636e46f64d8ae3c59fdb48
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D86 10648 bytes