Malicious PDF — malware analysis report

Static analysis result for SHA-256 43685dd8a4bf76dd…

MALICIOUS

PDF

40.3 KB Created: 2020-08-31 00:48:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 183ec5497d52e1d0f316e17967a7d8ad SHA-1: b4e6b8b95cde5d638803b21697071aa2a1a6d062 SHA-256: 43685dd8a4bf76dd656a11dab8e548979ac7da0672e23a6b0e1b27b7efebb95d
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 and contains numerous embedded links. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning attempt to distribute malicious content.

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/wix?keyword=roland+chemama+dicionario+de+psicanalise+pdf
    • https://cdn.shopify.com/s/files/1/0433/9567/8357/files/uniross_sprint_1h_manual.pdf
    • https://cdn.shopify.com/s/files/1/0450/1107/5222/files/manudozufixurile.pdf
    • https://cdn.shopify.com/s/files/1/0427/4411/9462/files/kefijuxuzuguvu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/wozilagov.pdf
    • https://cdn.shopify.com/s/files/1/0435/7046/2883/files/automate_programmable_industriel.pdf
    • https://cdn.shopify.com/s/files/1/0433/5910/9279/files/kotor_restoration_mod.pdf
    • https://cdn.shopify.com/s/files/1/0429/9954/6009/files/55454015626.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/muvipazapo.pdf
    • https://cdn.shopify.com/s/files/1/0435/9408/8616/files/wugir.pdf
    • https://cdn.shopify.com/s/files/1/0438/3673/5645/files/heart_chakra_guided_meditation_script.pdf
    • https://cdn.shopify.com/s/files/1/0433/2971/6374/files/bus_stop_movie_free_naa_songs.pdf
    • https://cdn.shopify.com/s/files/1/0433/1002/2814/files/golitiwizanakosodogomodux.pdf
    • https://cdn.shopify.com/s/files/1/0455/6704/9893/files/kusumexowil.pdf
    • https://cdn.shopify.com/s/files/1/0434/5331/7272/files/que_es_psicologia_educativa.pdf
    • https://cdn.shopify.com/s/files/1/0429/1464/4127/files/71189016512.pdf
    • https://static.usrfiles.com/ugd/efb3f0_4046bed7921e427f953b84b1d9ba2072.pdf
    • https://static.usrfiles.com/ugd/ea78e0_f511f0a9e03842ad97ca4e02dbbc8ba6.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_off00005ea6.bin
b2aaf76a6e5c24fc6636801d7c8e63a30177f49a57857fa204f84c193c5ce66f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA6 5404 bytes
font_01_sfnt_off000070d6.bin
46673d61e68dd7762625655c4ab01e636e697cabebb282c978a53624efb84c3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70D6 10228 bytes

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