Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fced9b22c7431f8…

MALICIOUS

PDF

111.1 KB Created: 2020-08-22 02:15:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6de02a42d595f986cb9438b31ffde7f SHA-1: 068e096045696a3650653bbd939ecc67a9dfee4c SHA-256: 5fced9b22c7431f8365234f2753a155efd2fa0aa2a94e745a10d6249fa99cd2d
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 text referencing 'Chobits episode guide' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of numerous other PDF links, many benign, may indicate an attempt to blend malicious links with legitimate ones.

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=chobits+episode+guide
    • http://files.solutionfm.com/uploads/1/3/0/9/130969993/fevatetupe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0944/0933/files/el_anarquismo_funciona.pdf
    • https://cdn.shopify.com/s/files/1/0434/6567/0806/files/forex_risk_management_strategies.pdf
    • https://cdn.shopify.com/s/files/1/0428/3075/8054/files/bodaxibiwunok.pdf
    • https://cdn.shopify.com/s/files/1/0430/5554/6517/files/73726925858.pdf
    • https://cdn.shopify.com/s/files/1/0428/2315/5878/files/95271973229.pdf
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/lomalafike.pdf
    • https://cdn.shopify.com/s/files/1/0432/7433/8454/files/gimisaxakaxuw.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6166/files/rovevap.pdf
    • https://cdn.shopify.com/s/files/1/0435/4683/7151/files/adjectives_ed_o_ing_ejercicios.pdf
    • https://cdn.shopify.com/s/files/1/0433/4062/8136/files/75883225807.pdf
    • https://cdn.shopify.com/s/files/1/0446/5026/6787/files/suspicious_activity_report_example_uk.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_off0000fb46.bin
18e4eaf81f9de0b991e4afb39f0e211e88c86a5dd94605cfc2f7a53ce8d94f15
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB46 35616 bytes
font_01_sfnt_off00016850.bin
669d0cfbced970a69a8695236c2159e3b0307b27c5cb0fa5e9272843e1e68576
pdf-font-stream PDF embedded font (sfnt) at offset 0x16850 4928 bytes
font_02_sfnt_off00017908.bin
14ea6e0bdaf7b38b57e0509a2bcc766f60d53080014ef62cb15734629f689d3b
pdf-font-stream PDF embedded font (sfnt) at offset 0x17908 16900 bytes