Malicious PDF — malware analysis report

Static analysis result for SHA-256 680e49ddc1600f5a…

MALICIOUS

PDF

39.2 KB Created: 2020-08-31 13:52:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8fb1b429a2a9c84f3243788babe515c SHA-1: 2bcde02e5b86bb0ac24f0b4c9d17468224a139b6 SHA-256: 680e49ddc1600f5a9a739ce74d5861a8c80047333ce285be36651df1a0fd86bd
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document contains a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=netflix+apk++for+windows+8', which is designed to lure users into downloading potentially malicious software. The document also hosts a large number of external PDF links, many of which are benign, but the primary redirector is a critical finding. The ML classifier strongly indicated maliciousness, and the presence of a download button lure further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=netflix+apk++for+windows+8
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0441/3915/1512/files/dalewawam.pdf
    • https://cdn.shopify.com/s/files/1/0434/4017/7314/files/jezegofiwuzokonixexabete.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/lugesemivafiriw.pdf
    • https://cdn.shopify.com/s/files/1/0433/7467/4083/files/58367217492.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/8178294458.pdf
    • https://cdn.shopify.com/s/files/1/0429/5373/6348/files/action_words_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/3300/1126/files/beating_the_streets_by_peter_lynch.pdf
    • https://static.usrfiles.com/ugd/909b15_70906a4b93284642a6ef935929203217.pdf
    • https://static.usrfiles.com/ugd/b8c837_d38277e2a9b847398950cba23cbe59a6.pdf
    • https://static.usrfiles.com/ugd/b8c837_56a55d44d62a4731ad5ed01b4f256b52.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rosetotirumeza.pdf
    • https://cdn.shopify.com/s/files/1/0434/4283/1522/files/hungry_shark_evolution_game_hack.pdf
    • https://cdn.shopify.com/s/files/1/0431/8907/6117/files/gedosepadokupugusi.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_off00005b23.bin
2442e0455a30e15504d083bbbf72784bb7baaddd701090994da76236a864d412		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B23 5420 bytes
font_01_sfnt_off00006dc4.bin
7463c002bac8e007503e6bcb3383d73c7e4d584990546d556c853f667044b68c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC4 10084 bytes

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