Malicious PDF — malware analysis report

Static analysis result for SHA-256 9246888ce66dec52…

MALICIOUS

PDF

47.2 KB Created: 2020-08-08 00:59:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cee803f7bfddd89e7a643478e7259a9a SHA-1: 21fedf3985c7e11e5cb0c0468c6f45676ca7c7ff SHA-256: 9246888ce66dec52918b2587530696f9025193c71ebb41ba3789cbfaee2a9188
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a tutorial. The document body, though heavily obfuscated, also contains this URL and other Shopify links, suggesting a link farm for SEO poisoning or phishing. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood 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.cc/pify?keyword=connected+components+workbench+tutorial+pdf
    • http://files.trudiboatwright.com/uploads/1/3/1/6/131637016/1643265.pdf
    • http://files.helpfulmeditation.com/uploads/1/3/1/3/131379085/6063226.pdf
    • http://folipi.strategicshift.net/uploads/1/3/0/7/130776433/2461950.pdf
    • https://cdn.shopify.com/s/files/1/0431/8769/9876/files/jupox.pdf
    • https://cdn.shopify.com/s/files/1/0434/2025/4375/files/zovutezusanele.pdf
    • https://cdn.shopify.com/s/files/1/0429/2411/4076/files/43574390140.pdf
    • https://cdn.shopify.com/s/files/1/0429/1470/9670/files/tuzojifedoxobaf.pdf
    • https://cdn.shopify.com/s/files/1/0450/8853/8776/files/lactometer_reading_of_milk.pdf
    • https://cdn.shopify.com/s/files/1/0432/5467/7662/files/butixejozoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0776/1819/files/lusipufana.pdf
    • https://cdn.shopify.com/s/files/1/0432/9861/9557/files/25304729008.pdf
    • https://cdn.shopify.com/s/files/1/0435/9212/2527/files/namewisuzasavowagos.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/daroguzepotazinisemupi.pdf
    • https://cdn.shopify.com/s/files/1/0437/6441/6661/files/magic_the_gathering_macintosh.pdf
    • https://cdn.shopify.com/s/files/1/0431/4241/4492/files/legend_drake_lyrics.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_off000078f5.bin
92d2ef31600709575a307a88dc55446c6aaef8b1812118f73610f50706e83c46
pdf-font-stream PDF embedded font (sfnt) at offset 0x78F5 5596 bytes
font_01_sfnt_off00008bda.bin
940306dc6b13c2d7f162d4c64e798524f6487669b6d8c1ac185434e1c305c7e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x8BDA 10564 bytes