Malicious PDF — malware analysis report

Static analysis result for SHA-256 b62c418f8592edda…

MALICIOUS

PDF

54.7 KB Created: 2020-08-15 10:45:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f45321b5b7455a27efb5be8980867a47 SHA-1: 2cf07731430cb24125330d851544e9aabb6d62e4 SHA-256: b62c418f8592edda0dea16a6659ace7e1b983168a6ccb8b27e7478ae78ab9ace
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is used in conjunction with a keyword related to Android encryption. This suggests a phishing or malware delivery attempt. The PDF also hosts a large number of external links, many pointing to Shopify, which is characteristic of SEO link farms used to improve search engine ranking for malicious content. The ML classifier 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.ru/pify?keyword=android+9+encryption+samsung
    • http://files.coastalleadership.net/uploads/1/3/0/8/130874676/9627383.pdf
    • http://dapamip.degaband.net/uploads/1/3/1/4/131408849/3e43a44b2d.pdf
    • http://files.c-x.com/uploads/1/3/0/8/130874067/046ff6781389b.pdf
    • https://cdn.shopify.com/s/files/1/0431/7904/9121/files/fapinuzo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/20024917867.pdf
    • https://cdn.shopify.com/s/files/1/0437/3646/5559/files/murmurer__l_oreille_des_femmes.pdf
    • https://cdn.shopify.com/s/files/1/0437/7188/7767/files/investigacion_de_campo_definicion_segun_autores.pdf
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/dorebuna.pdf
    • https://cdn.shopify.com/s/files/1/0433/1569/1675/files/xoneg.pdf
    • https://cdn.shopify.com/s/files/1/0429/2601/4630/files/15772821852.pdf
    • https://cdn.shopify.com/s/files/1/0434/6858/7174/files/2003_road_king_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1261535930.pdf
    • https://cdn.shopify.com/s/files/1/0428/9898/1030/files/folutinajajitutedulibu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8667/6117/files/nikon_coolpix_s570.pdf
    • https://cdn.shopify.com/s/files/1/0440/5736/2597/files/72525899115.pdf
    • https://cdn.shopify.com/s/files/1/0434/1900/9189/files/chain_growth_polymerization.pdf
    • https://cdn.shopify.com/s/files/1/0434/5797/0328/files/wixoxosawasutaworulub.pdf
    • https://cdn.shopify.com/s/files/1/0434/0452/5720/files/78260874212.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_off000084ec.bin
e637e929042e3978bec96b31b3490ba660419ed310d31d627162007a830036f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84EC 6424 bytes
font_01_sfnt_off000094cd.bin
f254cf3520cd38b47ba0e6fbea73408be2a407d795d15ef5589a602f61395241		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94CD 5608 bytes
font_02_sfnt_off0000a7d1.bin
180d4d679c985789cb97eb5b0f0b75df81deb3448fa350266df2a98412cf7a72		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7D1 10924 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.