Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc9bb64e16edacbb…

MALICIOUS

PDF

43.6 KB Created: 2020-09-01 09:41:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed4407f52582ff8618a6840dde3ad60c SHA-1: 4f095879ae1d5c9f6449697bbffe57da7576f1fb SHA-256: fc9bb64e16edacbb0eeeb2d6f7299a8f05e5646354082ba059d141a7651223c4
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to host further malicious content or phishing pages. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. No scripts were extracted, limiting the analysis of the payload delivery mechanism.

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.com/wix?keyword=manualidades+para+hacer+en+navidad+con+fieltro
    • https://cdn.shopify.com/s/files/1/0437/9020/5090/files/78647850049.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuxovozukirofavekejob.pdf
    • https://cdn.shopify.com/s/files/1/0429/6641/7571/files/takokanasilavetevifa.pdf
    • https://cdn.shopify.com/s/files/1/0430/2707/1127/files/tejej.pdf
    • https://static.usrfiles.com/ugd/73cb9e_e1164a85b7bb45e6a1247490cbbe1239.pdf
    • https://static.usrfiles.com/ugd/735189_20e1fd49eb8a4fb0a113b0b6e47eed46.pdf
    • https://static.usrfiles.com/ugd/b8c837_dfb3f0fb8f694c62ba1aebb548656911.pdf
    • https://static.usrfiles.com/ugd/b8c837_821e933222a64af9b7de43d3807d34f3.pdf
    • https://cdn.shopify.com/s/files/1/0431/3278/0695/files/psychosis_creepypasta.pdf
    • https://cdn.shopify.com/s/files/1/0433/0681/1560/files/31326969882.pdf
    • https://cdn.shopify.com/s/files/1/0440/8374/0822/files/cambodian_news_information_center.pdf
    • https://cdn.shopify.com/s/files/1/0433/5907/6510/files/caminito_de_la_escuela_letra.pdf
    • https://cdn.shopify.com/s/files/1/0437/5235/8039/files/regimento_interno_da_assembleia_legislativa_de_roraima.pdf
    • https://cdn.shopify.com/s/files/1/0429/9315/6259/files/67876777119.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/
    • https://cdn.shopify.com/s/files/1/0429/6641/7571/files/takokanasilavetevifa

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a9e.bin
fa7b919dc276c4222b38060395827075bf000414d1667944630eec8c85e68629
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A9E 5308 bytes
font_01_sfnt_off00007cb9.bin
ce7b993391767f38aa0c06c657390ee07e7a5b0cf27179332879207f58b05635
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB9 11220 bytes