Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b8b43686eea1032…

MALICIOUS

PDF

43.4 KB Created: 2020-08-10 05:59:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38255f4d8871c2e148d305d860a78e4b SHA-1: bd1efc312ff33219cd10cda26c2d07ea46531061 SHA-256: 2b8b43686eea103272f88bb270b4a1558c60b0ada96016b419acbcedb85f9dd4
128 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify, and one critical link to a known malicious redirector at ttraff.com. The document body text, though partially corrupted, includes phrases like "free download" and the malicious redirector URL, suggesting a lure to trick users into clicking through to malicious content. No scripts were extracted from this sample.

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.com/pify?keyword=digital+electronics+books+pdf+free+download
    • http://files.rubypurplecreations.com/uploads/1/3/1/4/131483491/zuxofadugofu_xamezojuxeso_zazupejofitule.pdf
    • http://files.sweetiescateringnc.com/uploads/1/3/2/7/132712080/6172744.pdf
    • http://jebam.cateringbyalma.com/uploads/1/3/0/8/130873851/givikum.pdf
    • http://files.koldenpianolessons.com/uploads/1/3/0/9/130968933/3956533.pdf
    • https://cdn.shopify.com/s/files/1/0439/5152/1947/files/3267034626.pdf
    • https://cdn.shopify.com/s/files/1/0431/9825/1165/files/lodelakixasuruxagaxonope.pdf
    • https://cdn.shopify.com/s/files/1/0433/0881/0398/files/converter_to_word_offline_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/3393/4496/files/luzogusamijava.pdf
    • https://cdn.shopify.com/s/files/1/0434/4211/0625/files/kisijipo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5386/6408/files/isospora_belli_morphology.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mujunevuduw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rinajimakonewob.pdf
    • https://cdn.shopify.com/s/files/1/0434/7055/3238/files/fugegasozepalosuxiralu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5848/7703/files/mufari.pdf
    • https://cdn.shopify.com/s/files/1/0434/8506/9477/files/73394477952.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_off000060bb.bin
088323526b63f4adf93a627d794f7576586cb196c2b24b15470b7aad0079db2b
pdf-font-stream PDF embedded font (sfnt) at offset 0x60BB 5620 bytes
font_01_sfnt_off000073f6.bin
2d35fe1b112251630f6c3e185fb4bf58c6327cea99f60afab3ca0473214b5b30
pdf-font-stream PDF embedded font (sfnt) at offset 0x73F6 2116 bytes
font_02_sfnt_off00007dc1.bin
8ca79cf9a1eef480552a634205d5f6538907f7976c1c1937bfab484650bd18a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC1 9972 bytes