Malicious PDF — malware analysis report

Static analysis result for SHA-256 880a616363ef8c3b…

MALICIOUS

PDF

58.1 KB Created: 2020-08-06 14:42:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 083f672a48cb2a5c550b9ed791dfb4b3 SHA-1: ef51d3d58c9a658a2c7994e2f525106e4b466543 SHA-256: 880a616363ef8c3b906893f08251adaf49c2beaa5fc85cafd1ffe5ade9761832
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, contains references to 'amulet book series pdf' and the malicious URL, suggesting a lure. The presence of numerous Shopify links, many of which are benign, likely serves to obscure the malicious redirector within a larger link farm.

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/pify?keyword=amulet+book+series+pdf
    • http://files.buildingbrilliantlives.com/uploads/1/3/1/8/131856276/wakev.pdf
    • http://files.gforceunlimited.com/uploads/1/3/1/6/131606056/9376217.pdf
    • http://files.kidstuffcollection.com/uploads/1/3/0/7/130776682/rasigepez.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/7547/7414/files/wupatizavabinotu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3592/files/99923114905.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/vababoparaneba.pdf
    • https://cdn.shopify.com/s/files/1/0430/6750/6845/files/13072076135.pdf
    • https://cdn.shopify.com/s/files/1/0433/0497/6548/files/96810445564.pdf
    • https://cdn.shopify.com/s/files/1/0434/6223/0181/files/rilimotovibileriduvesutit.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8903/files/fegitowikuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/1955/8299/files/xemasudopanesu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3690/0504/files/fikazowabakoveba.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4900/files/heat_index_formula.pdf
    • https://cdn.shopify.com/s/files/1/0435/8039/1585/files/53541191454.pdf
    • https://cdn.shopify.com/s/files/1/0435/1698/5503/files/vemaposuvudajab.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/44484222312.pdf
    • https://cdn.shopify.com/s/files/1/0437/9007/4018/files/vufezefivolifo.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9805/files/24009552661.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000097ac.bin
2105797063fd3605f87c9924f33a91cde7154ebd4b42817436ebb4bb59cbc3e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97AC 4944 bytes
font_01_sfnt_off0000a87b.bin
91c084001b93c2d328d08c74f43d11470d52ac9ae29092ff99a0657f7b123197		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA87B 10408 bytes
font_02_sfnt_off0000cb97.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB97 4324 bytes

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