Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9290d1672483bb9…

MALICIOUS

PDF

40.3 KB Created: 2020-08-14 21:55:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b1d24d0e8828c698867acc69773346d SHA-1: eb89a4918a22172455d28803257ba99b164985ee SHA-256: a9290d1672483bb914f86f594c3a539efe68edb497ebc887b16e540a2b856219
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely the primary malicious payload delivery mechanism. The document body, though heavily obfuscated, contains the same text as the URL parameter, indicating a lure to generate traffic to the malicious redirector.

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=what+does+a+performance+muffler+do
    • http://files.beadsnbottlecaps.com/uploads/1/3/1/6/131606720/c6bd64253.pdf
    • http://files.ayerpublicaccess.org/uploads/1/3/1/0/131069869/2872705.pdf
    • http://files.abideproductions.com/uploads/1/3/1/4/131409498/5426069.pdf
    • https://cdn.shopify.com/s/files/1/0432/8436/5476/files/bediwotujeg.pdf
    • https://cdn.shopify.com/s/files/1/0443/8904/0294/files/chez_nous_4th_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/6046/9660/files/alagarsamy_medicinal_chemistry.pdf
    • https://cdn.shopify.com/s/files/1/0428/0995/0367/files/285741192.pdf
    • https://cdn.shopify.com/s/files/1/0433/4511/7342/files/jutivuketomoxapeliruvu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5317/0339/files/67408415652.pdf
    • https://cdn.shopify.com/s/files/1/0433/3977/6159/files/zegelimopofulizato.pdf
    • https://cdn.shopify.com/s/files/1/0434/5567/6580/files/88800024110.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_off000060ac.bin
c2addc1e0d8fec6e6b41d0ef5dba7a3ac3aab3ac6d2384a56c981cb868508ef8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60AC 5408 bytes
font_01_sfnt_off000072fe.bin
e39363cf9de17fa51fdce38f79a6d48dcca93cd10affd91c1f79d70645ae881d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72FE 9852 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.