Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba14433474d66a37…

MALICIOUS

PDF

39.5 KB Created: 2020-08-24 14:20:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7e7427d157b1ef71e3ce35a641d6bcc SHA-1: c4ef186010cbd435c84da0ee879f3af3876a4078 SHA-256: ba14433474d66a3778b241def71e6d5aad39c34d73df34e1872dc8e315c6af10
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector, indicating a phishing or scam attempt. The document body text and embedded URLs suggest a lure related to free PDF to Word conversion software. The primary malicious URL, https://ttraff.ru/pify?keyword=pdf+to+word+creator+software+free, is a known redirector. The ML classifier also strongly indicated maliciousness.

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=pdf+to+word+creator+software+free
    • http://files.usaerospacedefensegroup.com/uploads/1/3/1/6/131606393/xadujisejajisat.pdf
    • http://files.dkgalphasigma.org/uploads/1/3/2/7/132741144/zujufusu-dufefokixit-fewup.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8099/files/15665056720.pdf
    • https://cdn.shopify.com/s/files/1/0431/3507/4465/files/8663157897.pdf
    • https://cdn.shopify.com/s/files/1/0433/1264/4251/files/visualizing_human_biology.pdf
    • https://cdn.shopify.com/s/files/1/0434/5249/8070/files/fairy_tales_in_malayalam.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mapiguwidekedod.pdf
    • https://cdn.shopify.com/s/files/1/0437/2925/6602/files/sajaji.pdf
    • https://cdn.shopify.com/s/files/1/0434/0406/6983/files/12851755017.pdf
    • https://cdn.shopify.com/s/files/1/0431/7495/3120/files/10583604354.pdf
    • https://cdn.shopify.com/s/files/1/0459/9939/0879/files/chinchilla_petco_care_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/8660/1626/files/chemistry_notes_for_class_12_sindh_board_free_download.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d35.bin
f8a3c3325f80986ca0069965135f941202086df4879fa5516a7f1d52f1a1c703
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D35 5076 bytes
font_01_sfnt_off00006e91.bin
ced0c221dae7d7e4a76c9d6ebc74f313a8bdbfd5f5d58ac694ccdf75ada68fea
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E91 10288 bytes