Malicious PDF — malware analysis report

Static analysis result for SHA-256 d532dcc38921c19d…

MALICIOUS

PDF

43.2 KB Created: 2020-08-30 03:47:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cde81c9b8061501e1580e03dd042b87d SHA-1: db04af58faddc1dfe4514fa0e674433bbe79f111 SHA-256: d532dcc38921c19de42f531b0200d4629678732d79d44011945b00126debafc1
152 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious and contains numerous embedded links. One of these links, `https://ttraff.ru/wix?keyword=centros+ceremoniales+de+los+totonacas`, points to a known malicious redirector. The presence of a link farm suggests an attempt to distribute malicious content or engage in SEO poisoning to lure unsuspecting users. The document body itself is largely unreadable binary data, but the presence of the malicious URL is a strong indicator of malicious intent.

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/wix?keyword=centros+ceremoniales+de+los+totonacas
    • https://static.usrfiles.com/ugd/63d3ad_62da48742a404dc698621090caeebaf3.pdf
    • https://static.usrfiles.com/ugd/b8c837_7e32734075e9409abeaa4780a30b8d12.pdf
    • https://static.usrfiles.com/ugd/d54300_fdc7ca63e1d9496287a6ded68ad7f301.pdf
    • https://static.usrfiles.com/ugd/b8c837_50199653541b47a692d79a1b27ef0e76.pdf
    • https://static.usrfiles.com/ugd/3aee12_7e8c8b87a66f458ca61e6f8e68706241.pdf
    • https://static.usrfiles.com/ugd/b8c837_a549923e13cf4248b8a2f4a604685c78.pdf
    • https://static.usrfiles.com/ugd/b8c837_dd43c14f88954335ae0f6564ca109218.pdf
    • https://static.usrfiles.com/ugd/b8c837_b141bc19f86a429baf8c81e42b40d6e9.pdf
    • https://cdn.shopify.com/s/files/1/0437/0703/9897/files/87901325619.pdf
    • https://cdn.shopify.com/s/files/1/0434/2228/5976/files/95352270802.pdf
    • https://cdn.shopify.com/s/files/1/0432/8230/1094/files/262533304.pdf
    • https://cdn.shopify.com/s/files/1/0437/6631/7205/files/canon_eos_60d_manual_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0431/1806/7876/files/hoe_een_beveiligd_afdrukken.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89965927340.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_off0000698d.bin
15d330b2a3af6d9ed19dafe49e06c72a3d42c93f9439378ea3e7108ebfc4b63b
pdf-font-stream PDF embedded font (sfnt) at offset 0x698D 4992 bytes
font_01_sfnt_off00007a5e.bin
fd504013b9f236a13295f0a737b05c9fd8b2dc2ce3ff5c5fef27d6984ef7a38d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A5E 11048 bytes