Malicious PDF — malware analysis report

Static analysis result for SHA-256 98d0135b8c23f5aa…

MALICIOUS

PDF

42.7 KB Created: 2020-08-19 04:32:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4cf3622db3d08081702f68990f8556e1 SHA-1: 7bb205ca5d7436c88f47f131d18a76de66c5e644 SHA-256: 98d0135b8c23f5aadbe24bafe987f9d28595d6b1bbccacf4d4c7a9bd30433fe1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a lure related to a 'graphic tablet app for android' and includes a link to a known malicious redirector. The document also contains a large number of embedded links, many pointing to Shopify, suggesting a link farm for SEO manipulation. The presence of a remote support tool lure indicates an attempt to gain user trust for further malicious actions.

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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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=graphic+tablet+app+for+android
    • http://files.upcyclemom.net/uploads/1/3/2/6/132695525/pusuworujes.pdf
    • http://zavemigo.quintinowens.com/uploads/1/3/1/4/131437657/1022824.pdf
    • http://files.firecracker100k.com/uploads/1/3/0/7/130775528/govujukegod-komuramiwaza-wenedidipabom-gugogusasipen.pdf
    • http://files.sunnysweetskin.com/uploads/1/3/1/6/131606782/7444873.pdf
    • http://senixapam.mckinleyandmoth.com/uploads/1/3/2/6/132681351/tomitakarujofa-bexebakiselus.pdf
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/oscilloscope_guide.pdf
    • https://cdn.shopify.com/s/files/1/0438/0868/6237/files/best_scholarship_application_letter.pdf
    • https://cdn.shopify.com/s/files/1/0431/4130/0380/files/mcgraw_hill_education_sat_2017_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/8076/0990/files/56898533523.pdf
    • https://cdn.shopify.com/s/files/1/0430/5561/2058/files/lekevuxonikalin.pdf
    • https://cdn.shopify.com/s/files/1/0430/9814/4932/files/daviduwodot.pdf
    • https://cdn.shopify.com/s/files/1/0432/0352/6820/files/47351607941.pdf
    • https://cdn.shopify.com/s/files/1/0437/2480/0154/files/69363433638.pdf
    • https://cdn.shopify.com/s/files/1/0440/2829/7381/files/kizikurum.pdf
    • https://cdn.shopify.com/s/files/1/0433/7437/9158/files/87776607125.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/jurnal_pingsan.pdf
    • https://cdn.shopify.com/s/files/1/0432/6454/0835/files/metabolismo_de_lipidos_de_membrana.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44240048578.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_off0000694f.bin
69e71511d80efdbc79ceb79ebf0633600c81ad498bbf3280db230e81027c4ec0
pdf-font-stream PDF embedded font (sfnt) at offset 0x694F 5236 bytes
font_01_sfnt_off00007b11.bin
8138ba003770f9300051ca2091a92748715c5a63bbc610c6d5ec27527d76b7e2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B11 10000 bytes