Malicious PDF — malware analysis report

Static analysis result for SHA-256 db38d2b00f0981e6…

MALICIOUS

PDF

50.7 KB Created: 2020-07-30 20:51:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c06ce7a8ba33a9a3cab6ded973d68bd7 SHA-1: 346b2a3eb62df99bba8eb165d49a1014c71ec92f SHA-256: db38d2b00f0981e603fae0eb4f9952bf9481abe6baf3871d432743110bbb0b19
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, masquerading as a download for an engineering drawing book. One of these links, `https://ttraff.com/pify?keyword=engg+drawing+book+pdf+download`, points to a known malicious redirector. The presence of a large number of external PDF links, many hosted on `cdn.shopify.com`, suggests a link farm designed to attract clicks. The ML classifier also strongly flagged this PDF as malicious.

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=engg+drawing+book+pdf+download
    • http://files.thecherigroves.com/uploads/1/3/1/3/131398156/0c09cff1c7.pdf
    • http://files.audiotechmalta.com/uploads/1/3/0/7/130740547/netenimogowejo_zateselo_sutijaguge.pdf
    • http://files.bay-point-church.com/uploads/1/3/2/7/132712282/4132290.pdf
    • http://files.apostolicdeliverancefive.org/uploads/1/3/2/6/132681976/felidul.pdf
    • http://files.bay-point-church.com/uploads/1/3/2
    • https://cdn.shopify.com/s/files/1/0440/3711/1958/files/lebovulogekewoxuruf.pdf
    • https://cdn.shopify.com/s/files/1/0431/0263/4148/files/resuzotavuwo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9067/3813/files/jolakogojatumazitakukesu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9004/3285/files/40379723904.pdf
    • https://cdn.shopify.com/s/files/1/0430/4768/2201/files/98917628950.pdf
    • https://cdn.shopify.com/s/files/1/0430/8038/4674/files/dawalanavi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6576/1176/files/tidupize.pdf
    • https://cdn.shopify.com/s/files/1/0429/5114/7676/files/ramefakawidomobopepede.pdf
    • https://cdn.shopify.com/s/files/1/0430/2451/5229/files/jewufivebikuru.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/zezibusatexunugov.pdf
    • https://cdn.shopify.com/s/files/1/0437/2050/7546/files/zabasawol.pdf
    • https://cdn.shopify.com/s/files/1/0434/8670/7876/files/redijivagejunu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1912/4382/files/toforesevova.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_off000070eb.bin
0fa563de5323717dee47031d24787cd926ea3903c04eb3d7d6ca0d7a1ae3b173
pdf-font-stream PDF embedded font (sfnt) at offset 0x70EB 4876 bytes
font_01_sfnt_off00008182.bin
33d80b5e357abfa3ea91f5eff18928953f8e36d8e9a7aea158c838e8ae756dd9
pdf-font-stream PDF embedded font (sfnt) at offset 0x8182 2116 bytes
font_02_sfnt_off00008b4c.bin
b3445ca530569c67e60d07c9a88d6bb17b89595fc12db7f6bf8dd349d43d6f0e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B4C 15696 bytes