Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e520f9570ae7094…

MALICIOUS

PDF

38.9 KB Created: 2020-08-16 13:58:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f23d65d2402e828058c8233d664094f9 SHA-1: b4d1de223b8f3542f655cb2d9a4f133d49f0b37f SHA-256: 6e520f9570ae7094725db513f7e13518962328f3a817718de8e3a8340bac01e2
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector and a link farm. One of the primary links points to a redirector on 'ttraff.com', suggesting an attempt to obscure or chain malicious destinations. The document body, though heavily obfuscated, contains a URL similar to the malicious one, and the presence of many external PDF links indicates a coordinated effort to distribute content, potentially malicious.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=instagram++images+android
    • http://files.villa.balibidadaritours.com/uploads/1/3/0/7/130739415/rebawe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0631/2091/files/87174876340.pdf
    • https://cdn.shopify.com/s/files/1/0432/1044/0862/files/cpr_algorithm.pdf
    • https://cdn.shopify.com/s/files/1/0432/1024/4256/files/kingdom_hearts_2_drive_forms.pdf
    • https://cdn.shopify.com/s/files/1/0427/8150/7740/files/toluxuganuza.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/resozelofik.pdf
    • https://cdn.shopify.com/s/files/1/0429/9338/5633/files/72719911370.pdf
    • https://cdn.shopify.com/s/files/1/0434/3817/8470/files/babalu_menu.pdf
    • https://cdn.shopify.com/s/files/1/0439/4031/5294/files/90789457016.pdf
    • https://cdn.shopify.com/s/files/1/0437/6448/2202/files/73339445330.pdf
    • https://cdn.shopify.com/s/files/1/0435/5329/2440/files/golden_sun_dark_dawn_djinni.pdf
    • https://cdn.shopify.com/s/files/1/0432/7899/1520/files/vawuwekub.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_off00005bd0.bin
8993894d56085fc8e1846414e8a02cc5d9c118a2b48458b3859b95653fefd0fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BD0 5052 bytes
font_01_sfnt_off00006cd9.bin
fbbac56722846196c0c63d75a1a0a29fe892a0c31f8dcfe4a9f5fa15c0e4ccd1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CD9 10036 bytes