Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d1b49ca17b25cb9…

MALICIOUS

PDF

45.6 KB Created: 2020-08-26 19:43:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce0ca7049d9fe2611475dda733cdfa7e SHA-1: 85eec7c055597d478e4d0ee1a14f8847287a4a57 SHA-256: 4d1b49ca17b25cb90def30083bc5dfef8fb3345a0cfcc0313d17b3d0190ce51c
128 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link is designed to lure users into downloading further malicious content by presenting itself as a 'dwg file converter to pdf'. The document also contains a large number of external links, many hosted on Shopify, which is indicative of a link farm used for SEO poisoning to attract victims.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=dwg+file+converter+to+pdf
    • http://vivus.moonsiewshutters.com/uploads/1/3/1/4/131437605/banasewetedidadon.pdf
    • http://files.bullets-n-beans.com/uploads/1/3/1/0/131070674/peroxixunik.pdf
    • http://files.totallylinkedin.com/uploads/1/3/0/7/130739239/nubiziwenetob.pdf
    • http://files.msfegen.com/uploads/1/3/0/7/130775221/a7d765bb8371a67.pdf
    • https://cdn.shopify.com/s/files/1/0431/9969/2958/files/96808521166.pdf
    • https://cdn.shopify.com/s/files/1/0451/7547/2279/files/harmful_effect_of_smoking.pdf
    • https://cdn.shopify.com/s/files/1/0433/5288/3352/files/dafaze.pdf
    • https://cdn.shopify.com/s/files/1/0428/3272/4124/files/lodam.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6278/files/59843135000.pdf
    • https://cdn.shopify.com/s/files/1/0433/6697/3598/files/fulanubebiwekaxukobaw.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/welixegike.pdf
    • https://cdn.shopify.com/s/files/1/0433/6097/7048/files/download_pokemon_omega_ruby_rom_decrypted.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3832/files/72723341820.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_off00006851.bin
fbe2448be80cfbb2a16aeb3ace7d72554c13c3c544f31f5f3113755175147bf4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6851 4872 bytes
font_01_sfnt_off00007908.bin
a69ca5742eb829ebbf1d0106ec411dc7061c855b5b679f8602ad25d058f0f46a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7908 10128 bytes
font_02_sfnt_off00009bc6.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9BC6 4324 bytes