Malicious PDF — malware analysis report

Static analysis result for SHA-256 eadd663fa0a134ad…

MALICIOUS

PDF

39.4 KB Created: 2020-10-27 15:19:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f749be03ffd0dbbd53dd0ef9e8d8ef27 SHA-1: 1e6eb517ef95ec8f4f90eb5c6b12cdaa65714048 SHA-256: eadd663fa0a134ad4cbc012279e629cbed11fb618eb8ac136ac1210cb52db1b4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains text suggesting a lure related to a 'wildlife learning center groupon' and includes numerous embedded URLs, many pointing to PDF files, consistent with a link farm or SEO poisoning tactic. The ML classifier also strongly flagged this PDF as malicious.

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.com/123?keyword=wildlife+learning+center+groupon
    • https://cdn-cms.f-static.net/uploads/4366993/normal_5f89050d8728d.pdf
    • https://cdn-cms.f-static.net/uploads/4367944/normal_5f881559ad3ba.pdf
    • https://cdn-cms.f-static.net/uploads/4389797/normal_5f8e436a26aab.pdf
    • https://cdn-cms.f-static.net/uploads/4365539/normal_5f870c599d8fa.pdf
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/a8401ec7a9859.pdf
    • https://wiwawuvagowe.weebly.com/uploads/1/3/4/4/134496439/4951745.pdf
    • https://fopimakalegej.weebly.com/uploads/1/3/0/7/130738542/dagavolizebixek.pdf
    • https://vevinobe.weebly.com/uploads/1/3/4/4/134487659/1290427.pdf
    • https://remewizefo.weebly.com/uploads/1/3/1/8/131856163/4eb7db505c83f.pdf
    • https://fufivivol.weebly.com/uploads/1/3/0/8/130873849/724488.pdf
    • https://kezopepeza.weebly.com/uploads/1/3/4/3/134332650/2330101.pdf
    • https://najuxobetejip.weebly.com/uploads/1/3/4/2/134265875/2e52f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0497/7888/4759/files/ps_vita_emulator_apk_pro.pdf
    • https://cdn.shopify.com/s/files/1/0431/4575/6821/files/animal_farm_boxer_death.pdf
    • https://cdn.shopify.com/s/files/1/0483/5940/7765/files/lelerawaberizajexev.pdf
    • https://uploads.strikinglycdn.com/files/bdb1b4d2-cc4d-44e4-9eb1-875b86007c17/14642826664.pdf
    • https://uploads.strikinglycdn.com/files/5576c084-ab44-4528-bfde-9dc6a785a4d5/70474939345.pdf
    • https://s3.amazonaws.com/tuxutedi/agreement_on_trade_in_civil_aircraft.pdf
    • https://s3.amazonaws.com/memul/lonely_planet_japan_2018.pdf
    • https://s3.amazonaws.com/vapelurowar/arabic_words_and_their_meanings_in_english.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_off00005b9d.bin
861030b984ba07b814166861a369cbdfa716a10123388d15fd22f232e0596511		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B9D 5160 bytes
font_01_sfnt_off00006d41.bin
c1eeaabb3c2d6f75b44fe17dfdfcb8ea6a93efe686967a2817a590afd1e6bdf8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D41 10296 bytes

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