Malicious PDF — malware analysis report

Static analysis result for SHA-256 20ae59c041ba1bab…

MALICIOUS

PDF

69.4 KB Created: 2020-08-13 00:12:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce5994e9f7e1d43eaa89551d79bfde52 SHA-1: 1344d30d066f9cba3a7c506cef2e19798e549cd4 SHA-256: 20ae59c041ba1bab42b2fc3831f048b7fda579f71902777eba8ae438491d664c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which are hosted on potentially disposable domains. The ML classifier also strongly indicated maliciousness. These factors suggest the document is designed to lead users to malicious infrastructure.

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/pify?keyword=agile+software+development+principles+patterns+and+practices+pdf+github
    • http://files.whotookmycountry.com/uploads/1/3/0/9/130969308/toturike-jenakesunanute.pdf
    • http://files.upwardcr.com/uploads/1/3/1/1/131163914/wuxedafa-lobob-nanasate-nalex.pdf
    • http://files.edhamiltonstudios.com/uploads/1/3/0/7/130775350/lojojisadake-taxupuror-xelijusu-vababof.pdf
    • http://lipagiv.miyps.com/uploads/1/3/2/6/132682076/zigalasitaponamejar.pdf
    • https://cdn.shopify.com/s/files/1/0433/2093/4558/files/38843010194.pdf
    • https://cdn.shopify.com/s/files/1/0433/4262/6984/files/45891123402.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/nabude.pdf
    • https://cdn.shopify.com/s/files/1/0433/5766/7487/files/conair_hair_clippers_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/6775/3116/files/63805406028.pdf
    • https://cdn.shopify.com/s/files/1/0427/9785/8972/files/61949146270.pdf
    • https://cdn.shopify.com/s/files/1/0430/7202/8833/files/dulikovevumovebiramilaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/7248/6564/files/39618530411.pdf
    • https://cdn.shopify.com/s/files/1/0431/0273/2448/files/10_things_i_hate_about_you_script.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gekubamunanapomokavonata.pdf
    • https://cdn.shopify.com/s/files/1/0432/3845/7501/files/sevabajikobobadaniru.pdf
    • https://cdn.shopify.com/s/files/1/0434/4106/2040/files/proposal_skripsi_akuntansi_keuangan_terbaru.pdf
    • https://cdn.shopify.com/s/files/1/0437/7965/3789/files/teen_buzz_ringtone.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a813.bin
963874b65f57be0b878b98a86613660ffa82515aff0ddb16e7c4396f8b4ac82b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA813 12172 bytes
font_01_sfnt_off0000d023.bin
89f05af52253651062a71d3cf2b781997e6dd268fd011037ff8c9a8bd8f46ff1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD023 5852 bytes
font_02_sfnt_off0000e3f2.bin
833c4828eefd9dc1a10bac18fe23f8949c94c0c9e08fd8e713d0be67cbeef850		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F2 10356 bytes

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