Malicious PDF — malware analysis report

Static analysis result for SHA-256 50132f52837a4b9f…

MALICIOUS

PDF

42.4 KB Created: 2020-08-11 16:25:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f54df269f7ba14f61053a7f5827d9d1 SHA-1: 34d3acc0fc7886292c36e64a19c096ad2a5c4903 SHA-256: 50132f52837a4b9f6b10becce8b05cdc7351376eade5d074a6c2f9bce10a4034
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. The primary heuristic indicates a malicious redirector link, specifically 'https://ttraff.cc/pify?keyword=bronchite+chronique+traitement+pdf', which is presented as a treatment guide for chronic bronchitis. This suggests a phishing or scam attempt to lure users to potentially harmful content. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector and link farm is sufficient evidence.

Heuristics 3

  • 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.
  • 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=bronchite+chronique+traitement+pdf
    • http://fesaboba.eslbioscience.com/uploads/1/3/2/6/132682156/2104337.pdf
    • http://files.onegratefulleader.com/uploads/1/3/1/4/131407214/d0332.pdf
    • http://kusawaxo.oceanpoweramerica.com/uploads/1/3/0/9/130969060/3c1ef0688.pdf
    • https://cdn.shopify.com/s/files/1/0430/2723/4969/files/lovomibebotejurok.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3545/files/jiwuj.pdf
    • https://cdn.shopify.com/s/files/1/0438/8945/9368/files/lerivezotelezenipak.pdf
    • https://cdn.shopify.com/s/files/1/0434/7471/4790/files/ap_b._ed_psychology_book_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/17232613021.pdf
    • https://cdn.shopify.com/s/files/1/0431/0152/0023/files/algebras_rings_and_modules.pdf
    • https://cdn.shopify.com/s/files/1/0431/0247/0305/files/33825080746.pdf
    • https://cdn.shopify.com/s/files/1/0432/7345/3724/files/convert_to_word_macbook_pro.pdf
    • https://cdn.shopify.com/s/files/1/0432/6883/3436/files/cerita_ashabul_kahfi.pdf
    • https://cdn.shopify.com/s/files/1/0433/2008/2590/files/warefukasudizur.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/woburorofinuxup.pdf
    • https://cdn.shopify.com/s/files/1/0432/5651/2676/files/35653272144.pdf
    • https://cdn.shopify.com/s/files/1/0434/6567/0806/files/gomibujorow.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0945/files/74760538122.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_off00006920.bin
96b3310c6ba7b1b74ae83680e4e59f1d61b5eb2515a77016e365c0bedfec50ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x6920 5360 bytes
font_01_sfnt_off00007b21.bin
e1c018580c300df75176216ef913795867984be15634f7d804448ca8fc6b9b85
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B21 9828 bytes