Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a6db9cea49ba34a…

MALICIOUS

PDF

42.9 KB Created: 2020-08-20 06:00:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6eebd57d3ad7e7866fd49a9bbd52deca SHA-1: dc9e37a3cca7a1be7b186035f4113373b9bb989a SHA-256: 7a6db9cea49ba34ab6285a33b0fdc3a4cfaa1b31b35635ea67a561edd8f544a6
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to link farms and redirectors, indicating a spam or SEO poisoning campaign. The primary malicious URL, 'https://ttraff.ru/pify?keyword=best+rpg+games+online+for+android', is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains this URL and other Shopify links, suggesting an attempt to drive traffic to malicious sites under the guise of providing game information.

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=best+rpg+games+online+for+android
    • http://files.petersknifeshop.ch/uploads/1/3/1/8/131872017/kagitogif.pdf
    • http://jefixon.oerv-rettungshunde.com/uploads/1/3/1/6/131606490/soputetedoxu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/0546/7035/files/40014200561.pdf
    • https://cdn.shopify.com/s/files/1/0430/6078/9409/files/raxomuxazezuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/4321/6789/files/auscultation_of_the_respiratory_system.pdf
    • https://cdn.shopify.com/s/files/1/0438/2212/1122/files/43186584564.pdf
    • https://cdn.shopify.com/s/files/1/0431/2888/1313/files/consumer_report_top_10_used_cars.pdf
    • https://cdn.shopify.com/s/files/1/0431/2668/5858/files/68324524546.pdf
    • https://cdn.shopify.com/s/files/1/0427/4749/4567/files/52364078772.pdf
    • https://cdn.shopify.com/s/files/1/0435/6918/4931/files/hallelujah_pentatonix_satb.pdf
    • https://cdn.shopify.com/s/files/1/0461/4396/3299/files/game_tekken_tag_apk.pdf
    • https://cdn.shopify.com/s/files/1/0432/4117/7248/files/39._94326_75._20062.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_off00006797.bin
b66baff7e5b8dcd058e8a14077c060b05eb6037d2019470b8faa37fe45c2b1f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6797 5408 bytes
font_01_sfnt_off000079e0.bin
bf1509662c34ef7eda2b6a81d35e1abf107eee47026c31abe857b3026fdb98a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x79E0 10836 bytes