Malicious PDF — malware analysis report

Static analysis result for SHA-256 421b3ad2e097918b…

MALICIOUS

PDF

70.9 KB Created: 2020-08-26 02:02:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f51bafdb31c3559a1bc6debd4406569 SHA-1: 7f93df11673a7288dfe056c9a68abdf549b34e32 SHA-256: 421b3ad2e097918b1858e925c1724da0aca0ddec3be39a53f775cc377b64fab7
128 Risk Score

Malware Insights

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

The PDF contains a prominent link that appears to be a download for "Solidworks 2013 bible pdf". This link, however, redirects to a known malicious redirector at `ttraff.cc`. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to various PDF files, likely for SEO manipulation or to host further malicious content. The presence of a "download button" heuristic further supports the lure-based attack pattern.

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=solidworks+2013+bible+pdf
    • http://files.austintatiouseats.com/uploads/1/3/2/7/132712209/ninaku.pdf
    • http://files.actorbritthalaas.com/uploads/1/3/2/7/132710665/3871983.pdf
    • http://files.whisperwindaussies.com/uploads/1/3/1/4/131410870/kakaxivono.pdf
    • http://files.ericmccarron.com/uploads/1/3/0/8/130874382/3594543.pdf
    • http://files.rylequotes.org/uploads/1/3/0/8/130873921/kumam.pdf
    • https://cdn.shopify.com/s/files/1/0436/7102/7865/files/novilubu.pdf
    • https://cdn.shopify.com/s/files/1/0440/1840/1430/files/46544496749.pdf
    • https://cdn.shopify.com/s/files/1/0431/1023/6314/files/stent_thrombosis_treatment_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0433/0805/6740/files/texugupadixixokakaju.pdf
    • https://cdn.shopify.com/s/files/1/0431/5496/4637/files/65370633141.pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2383/files/94774734485.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/muzoguganava.pdf
    • https://cdn.shopify.com/s/files/1/0430/0763/9711/files/zosavosugeminuvalibuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/7342/8888/files/jelapa.pdf
    • https://cdn.shopify.com/s/files/1/0440/1286/3638/files/bassoon_christmas_music_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0430/0672/2211/files/38763461229.pdf
    • https://cdn.shopify.com/s/files/1/0431/8488/1825/files/72426960427.pdf
    • https://cdn.shopify.com/s/files/1/0433/1651/0873/files/2008_toyota_highlander_service_manual.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a52.bin
4e244410a8225c3cbfcbba09f875e532168e6a73c1f5f22fc8393fa12059fe27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A52 17648 bytes
font_01_sfnt_off0000b27c.bin
372f277155daec557f05c5bfe0a664b631ba57320ec98f64617bc75112264b0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB27C 5316 bytes
font_02_sfnt_off0000c4a3.bin
6b936a982366179184454093925d89f8b6ca59b197e92f2a6e50d1d277813a89		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4A3 10024 bytes
font_03_sfnt_off0000e748.bin
a0fc46ef69ad46c7b35fe613eb562f013af540b55bd9b224171bae216eb7756f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE748 16836 bytes
font_04_sfnt_off0000ff0b.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF0B 4324 bytes

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