Malicious PDF — malware analysis report

Static analysis result for SHA-256 55b4d62e434c6857…

MALICIOUS

PDF

60.8 KB Created: 2020-08-12 18:50:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae8df399c642171125ca785654032ed1 SHA-1: b08d9f938df7f4da4bad9838e8df47bf20119849 SHA-256: 55b4d62e434c685702cd7617dbb3d4803820569ce28431229f587dc338c8665f
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is further supported by a high ML classifier score. The document body, though corrupted, contains text related to a book title and URLs, suggesting a lure to disguise malicious links. The primary malicious URL is https://ttraff.cc/pify?keyword=thomas+mann+buddenbrooks+pdf+english, which likely redirects to a harmful destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=thomas+mann+buddenbrooks+pdf+english
    • http://files.monfortestatesdacula.com/uploads/1/3/1/3/131381540/gemitojotamid.pdf
    • http://wewofot.sonchaserrv.com/uploads/1/3/0/8/130873851/7982259.pdf
    • http://files.georgisztojanov.com/uploads/1/3/0/7/130739470/8980b562bcf27b.pdf
    • http://files.maryellencarsley.com/uploads/1/3/0/7/130776821/9081375.pdf
    • http://files.soldierhuntingfishing.com/uploads/1/3/0/7/130775249/vedegozofixa_ropel.pdf
    • https://cdn.shopify.com/s/files/1/0438/2670/8637/files/33720932636.pdf
    • https://cdn.shopify.com/s/files/1/0432/2125/4312/files/30680672870.pdf
    • https://cdn.shopify.com/s/files/1/0437/3708/8154/files/download_ubuntu_14._04.pdf
    • https://cdn.shopify.com/s/files/1/0432/8567/6188/files/nejalusiwofudolenuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/9376/1941/files/50964948933.pdf
    • https://cdn.shopify.com/s/files/1/0437/2715/9448/files/vajupob.pdf
    • https://cdn.shopify.com/s/files/1/0438/5538/0630/files/dafepepejena.pdf
    • https://cdn.shopify.com/s/files/1/0430/4614/2106/files/iptables_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/5010/6018/files/16302229170.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0219/files/neopets_secret_lab.pdf
    • https://cdn.shopify.com/s/files/1/0429/1729/8329/files/25015094906.pdf
    • https://cdn.shopify.com/s/files/1/0450/8103/4917/files/greenhouse_gases_emitted_in_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/44219577828.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009800.bin
972d12bb3f4b10ea4838e7706a668cef0afac432b6f23e08cddaf6c80e759b63
pdf-font-stream PDF embedded font (sfnt) at offset 0x9800 5608 bytes
font_01_sfnt_off0000aadd.bin
636abb0ad0996f7fa21d48a6aebbb304b2e2b653438c5b08bb7e6a98d18c2f75
pdf-font-stream PDF embedded font (sfnt) at offset 0xAADD 10528 bytes
font_02_sfnt_off0000cf1d.bin
66cd902b334fc3a8a450b3b7a42ffe5031cba7a4412f01eb774febfebf38087b
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF1D 16116 bytes