Malicious PDF — malware analysis report

Static analysis result for SHA-256 39f3e2eced7ad1d4…

MALICIOUS

PDF

49.9 KB Created: 2020-07-28 11:48:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4071f7ac503634380ef04ac7c1c1f3c5 SHA-1: e1904c2a5982d6460cdffd36b26b832beae56bf0 SHA-256: 39f3e2eced7ad1d40dbbb4696906ad4e82118ad0a5e0b71e103424d9e81996a9
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting PDF files. One critical heuristic indicates that the document links to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'wireless home phone with answering machine', suggesting a lure for potential buyers. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious content.

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=wireless+home+phone+with+answering+machine
    • http://files.ornamentsofexpression.com/uploads/1/3/1/4/131455883/vojosa.pdf
    • http://files.palmdigital.org/uploads/1/3/2/6/132695339/dovirak.pdf
    • http://files.jieunjunekim.com/uploads/1/3/2/6/132681492/vabugana.pdf
    • http://files.mobarts.org/uploads/1/3/1/4/131437161/zumusitu_paridepuvele_rovub_tosurozuw.pdf
    • http://files.changinglungcancer.com/uploads/1/3/0/9/130969825/e1c129c6c141512.pdf
    • http://files.jieunjunekim.com/uploads/1/3/2/6/
    • https://cdn.shopify.com/s/files/1/0432/3603/2680/files/6606027263.pdf
    • https://cdn.shopify.com/s/files/1/0439/4464/0667/files/julidazowofirugojegam.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/woburorofinuxup.pdf
    • https://cdn.shopify.com/s/files/1/0428/2174/6847/files/zukakifofekerejudatanode.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6278/files/59843135000.pdf
    • https://cdn.shopify.com/s/files/1/0437/3384/4119/files/38190087182.pdf
    • https://cdn.shopify.com/s/files/1/0427/9799/0055/files/walijipokomabafesiv.pdf
    • https://cdn.shopify.com/s/files/1/0435/8583/1070/files/kususamarerutu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1576/6177/files/bewokujubiwidinadozefoze.pdf
    • https://cdn.shopify.com/s/files/1/0429/1880/5657/files/12794706506.pdf
    • https://cdn.shopify.com/s/files/1/0436/7102/7865/files/57340914418.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_off00008341.bin
c20c0e299927904cc4ba934a66c79141a27406147e7fc9c26d715f41cccbfef4
pdf-font-stream PDF embedded font (sfnt) at offset 0x8341 5240 bytes
font_01_sfnt_off000094f8.bin
3e4b198ff058d7798c691ed84fab78c39ad9e22e02ef87d6bfb1faf5507a9dcc
pdf-font-stream PDF embedded font (sfnt) at offset 0x94F8 10948 bytes