Malicious PDF — malware analysis report

Static analysis result for SHA-256 9331924d34f29986…

MALICIOUS

PDF

40.8 KB Created: 2020-08-16 12:37:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e74afb0041d708f18a7e322744dc3513 SHA-1: e3b5835f4ed4d954e2be0252c6149a1abf2d10aa SHA-256: 9331924d34f29986f54d6fb03d914ea4f39cf7d89ef2dbc27b269d77b67679f8
154 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The embedded document body contains a URL pointing to a known malicious redirector, 'ttraff.ru', which is likely used to funnel victims to further malicious content. The presence of numerous links to external PDFs, many hosted on Shopify, suggests an attempt to obscure the final malicious destination or to leverage SEO techniques for distribution.

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=footjoy+golf+glove+size+guide
    • http://files.banginhardfireworks.com/uploads/1/3/0/7/130738755/9099253.pdf
    • http://files.esscliao.com/uploads/1/3/0/7/130775634/duzozubej_gevidab_faronuvakatikom_demezusidipenej.pdf
    • https://cdn.shopify.com/s/files/1/0437/9043/4456/files/fuzineluxu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2873/4367/files/54351693296.pdf
    • https://cdn.shopify.com/s/files/1/0431/4539/6386/files/60854863392.pdf
    • https://cdn.shopify.com/s/files/1/0438/4522/2550/files/complexity_economics.pdf
    • https://cdn.shopify.com/s/files/1/0433/1572/4456/files/27972392064.pdf
    • https://cdn.shopify.com/s/files/1/0432/1555/2674/files/27181884021.pdf
    • https://cdn.shopify.com/s/files/1/0429/6946/4991/files/14482764184.pdf
    • https://cdn.shopify.com/s/files/1/0431/1239/9010/files/sozakubepifejapet.pdf
    • https://cdn.shopify.com/s/files/1/0432/4796/0232/files/15415432918.pdf
    • https://cdn.shopify.com/s/files/1/0433/0386/2440/files/89393082812.pdf
    • https://cdn.shopify.com/s/files/1/0432/5769/2320/files/madevidobi.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_off00005472.bin
f1d6d230cfcce1926c9f0e0d44025c65fc023165a90b1731b6ce6afbe622cb06
pdf-font-stream PDF embedded font (sfnt) at offset 0x5472 4788 bytes
font_01_sfnt_off000064f2.bin
f4e262af0a86d8c610cbdf2e9e6dee57edd2f4f9dcc8bc56fa04fcecf2135e9b
pdf-font-stream PDF embedded font (sfnt) at offset 0x64F2 10260 bytes
font_02_sfnt_off000087d7.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x87D7 4324 bytes