Malicious PDF — malware analysis report

Static analysis result for SHA-256 56ecec346207c076…

MALICIOUS

PDF

43.2 KB Created: 2020-08-18 15:18:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3b5cef8ae210f65c76d1eaf6d24ff22 SHA-1: cea93f1624442652b790dc18e9d8a0b54f7d2495 SHA-256: 56ecec346207c076ed561fce2eb4c9a0c5f62c66eef49678352cf7484aefe631
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=production+planning+and+cost+estimation+book+pdf'. This URL is embedded within the document body, disguised as a book title. The PDF also exhibits characteristics of a link farm, with numerous external links, many of which point to Shopify domains hosting PDF files. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering through a deceptive link.

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=production+planning+and+cost+estimation+book+pdf
    • http://mulime.mcaassociates.com/uploads/1/3/0/7/130775047/3634493.pdf
    • http://files.gaiacrystals.com/uploads/1/3/0/9/130968921/savemuzekalikog_susojewev.pdf
    • http://xujuru.bbnla.com/uploads/1/3/2/7/132712615/wumijab-digodosuti-jududewu.pdf
    • http://tafek.rockriverreview.com/uploads/1/3/1/0/131070374/9d8a05f.pdf
    • http://jofumu.banderaarchitecture.com/uploads/1/3/1/4/131437914/22a3be0883.pdf
    • https://cdn.shopify.com/s/files/1/0428/9947/2550/files/ground_handling_deluxe.pdf
    • https://cdn.shopify.com/s/files/1/0433/4419/9848/files/ms_dos_batch_file_programming.pdf
    • https://cdn.shopify.com/s/files/1/0436/4291/2926/files/57646490635.pdf
    • https://cdn.shopify.com/s/files/1/0436/6375/3369/files/kilekijosen.pdf
    • https://cdn.shopify.com/s/files/1/0431/3228/9175/files/font_arciform_ttf.pdf
    • https://cdn.shopify.com/s/files/1/0440/9583/2216/files/93540000567.pdf
    • https://cdn.shopify.com/s/files/1/0428/2010/8455/files/pubesewonekegerixijana.pdf
    • https://cdn.shopify.com/s/files/1/0433/3817/0526/files/sanibel_captiva_tide_charts.pdf
    • https://cdn.shopify.com/s/files/1/0434/0262/5178/files/tazukudowede.pdf
    • https://cdn.shopify.com/s/files/1/0432/2256/5032/files/19521161598.pdf
    • https://cdn.shopify.com/s/files/1/0438/0321/3984/files/blouse_design_images_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/3033/0019/files/concurrency_in_go_by_katherine_cox_buday.pdf
    • https://cdn.shopify.com/s/files/1/0435/4224/9621/files/m_02vx4_m_0jm.pdf
    • https://cdn.shopify.com/s/files/1/0432/8862/5316/files/poultry_diseases_symptoms_and_treatment.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/1/0432/8862/5316/files/poultry_diseases_symptoms_

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006901.bin
14562a8ba06ff4a94c910162b7137341e8973a1cfebe959c42dbf8e54f404404
pdf-font-stream PDF embedded font (sfnt) at offset 0x6901 5680 bytes
font_01_sfnt_off00007c35.bin
0075b8a301d5429f87060b424b64ff1c24f03c4085799e010b6ae52bf7a8ed33
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C35 10388 bytes