Malicious PDF — malware analysis report

Static analysis result for SHA-256 c548a69c426a735f…

MALICIOUS

PDF

41.4 KB Created: 2020-08-10 04:47:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b576c730cb5db9c6a240cfef9ce39ea2 SHA-1: 28067faf4209f335d51b3d1082457d16e32b6268 SHA-256: c548a69c426a735f7d86f7cf2dce32169a8209bed751f835b3cc8415307a877d
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body and embedded links suggest a lure for 'O level chemistry notes', which redirects to `https://ttraff.com/pify?keyword=o+level+chemistry+notes+pdf+free+download`. This URL is likely part of a phishing or malware distribution scheme.

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.com/pify?keyword=o+level+chemistry+notes+pdf+free+download
    • http://files.mikewilldridge-artist.com/uploads/1/3/1/4/131437117/begurunakotudip_popowufixe_wowuloj_nerudinuz.pdf
    • http://files.trinitycommunitygroup.com/uploads/1/3/0/9/130969448/kabebijozewim_rogimokuvawafe.pdf
    • http://files.cmcedmasters.com/uploads/1/3/1/3/131380177/vozizatexozago_dizoren.pdf
    • http://files.hideawaylakes1977.com/uploads/1/3/1/4/131453084/norigusexas.pdf
    • http://files.michellepannorsilver.com/uploads/1/3/1/0/131070888/2f8ae263fcf.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/cultural_assimilation.pdf
    • https://cdn.shopify.com/s/files/1/0431/9110/7742/files/93034142350.pdf
    • https://cdn.shopify.com/s/files/1/0432/0962/1664/files/nudebugagerekekaguzu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3840/7845/files/nepetuzudizowabu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7431/3621/files/9203203961.pdf
    • https://cdn.shopify.com/s/files/1/0438/4001/2450/files/fumabivotozoxulen.pdf
    • https://cdn.shopify.com/s/files/1/0432/1558/5448/files/86237573293.pdf
    • https://cdn.shopify.com/s/files/1/0428/7853/3791/files/vapour_compression_refrigeration_system_nptel.pdf
    • https://cdn.shopify.com/s/files/1/0433/2149/1621/files/pixelmon_heat_rock.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7345/files/viropiverimikaxojajafes.pdf
    • https://cdn.shopify.com/s/files/1/0431/7426/4992/files/jufugixil.pdf
    • https://cdn.shopify.com/s/files/1/0437/0454/9531/files/nonlinear_control_khalil.pdf
    • https://cdn.shopify.com/s/files/1/0433/6523/6895/files/carlos_drummond_de_andrade_amor_natural.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_off000059f6.bin
ccbc7bb48a008d0bc5977445f12bed99bbe6a8ad1001f7efc5a66bfce1d383f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x59F6 5676 bytes
font_01_sfnt_off00006d31.bin
18f8f68ff4bd63e1b0c5bb6d5814bbe2a701104f24d60f6b192f472182d66a03
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D31 13916 bytes