Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8c1733d221a4fb9…

MALICIOUS

PDF

37.2 KB Created: 2020-08-11 08:10:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5426da4d84c7f3e7cd35b15ee71fa00a SHA-1: f2683b25eb74e4ee1f37ef39976788f70ab2aa6d SHA-256: b8c1733d221a4fb9a23e3e54e20bc521b5dff06c6ef8a53e6e2f086b4d837d6e
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=huduma+no+form+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, including one to 'https://cdn.shopify.com/s/files/1/0434/4388/0093/files/bicyclic_compounds.pdf'. The presence of a visual download button lure further supports the malicious intent.

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=huduma+no+form+pdf
    • http://files.anchorcounselingpasadena.com/uploads/1/3/1/4/131454850/2141881.pdf
    • http://files.sekureit.net/uploads/1/3/0/8/130813612/viwewivanavo-zafogigami-birokamunupa-takarij.pdf
    • http://wirogubid.movemoreeathealthy.org/uploads/1/3/0/8/130814328/798558.pdf
    • http://files.chicagonfc.com/uploads/1/3/0/7/130776490/laseninukam_viferon.pdf
    • http://tejuzot.taupakikarate.co.nz/uploads/1/3/0/8/130874254/9799333.pdf
    • https://cdn.shopify.com/s/files/1/0434/4388/0093/files/bicyclic_compounds.pdf
    • https://cdn.shopify.com/s/files/1/0431/3920/3229/files/potojepisunezenadig.pdf
    • https://cdn.shopify.com/s/files/1/0429/9993/9235/files/gamojuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9586/8067/files/22056641712.pdf
    • https://cdn.shopify.com/s/files/1/0434/7808/9878/files/dazoka.pdf
    • https://cdn.shopify.com/s/files/1/0440/1269/9798/files/24457204445.pdf
    • https://cdn.shopify.com/s/files/1/0438/3752/2080/files/autocad_drawing_file_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/3955/4727/files/jefedefaxadeleb.pdf
    • https://cdn.shopify.com/s/files/1/0439/2953/4632/files/racing_sponsorship_proposal.pdf
    • https://cdn.shopify.com/s/files/1/0438/6711/1584/files/boilie_rezepte.pdf
    • https://cdn.shopify.com/s/files/1/0436/0480/3746/files/91446523177.pdf
    • https://cdn.shopify.com/s/files/1/0431/1708/4839/files/72939729628.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_off000054cb.bin
e4d1e1c8546fba1c495b2b14527e1d3b99fe05a32857dd06bddad03a911b1c8c
pdf-font-stream PDF embedded font (sfnt) at offset 0x54CB 4940 bytes
font_01_sfnt_off00006578.bin
2fb8ee8ac9fd5081277f5b65ac1e4fffe1de6bbbfd84d4f55bae990377dc24db
pdf-font-stream PDF embedded font (sfnt) at offset 0x6578 10120 bytes