Malicious PDF — malware analysis report

Static analysis result for SHA-256 aef91831db7203dd…

MALICIOUS

PDF

44.8 KB Created: 2020-08-23 13:08:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4cc97b35c913b3d8cdbb5222fd31b496 SHA-1: 8a466dbf1f6d6eabb6c85aac0511f3fb17aa5387 SHA-256: aef91831db7203dde52b6a5c72b634cb4fb9d4ae1b5dc374a7818bbf9ccfd0aa
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link. The document body, though heavily obfuscated, contains a URL that appears to be part of the lure. The primary malicious URL identified is https://ttraff.com/pify?keyword=printable+fact+family+worksheets+first+grade, which is likely intended to redirect the user to a malicious site.

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=printable+fact+family+worksheets+first+grade
    • http://files.southernstylestudioandmore.com/uploads/1/3/1/6/131637055/jakugutiwikedo.pdf
    • http://files.denvermustangs.org/uploads/1/3/0/7/130775528/lugusogenosawa-nukukukagufeba.pdf
    • https://cdn.shopify.com/s/files/1/0430/6829/3287/files/92032421204.pdf
    • https://cdn.shopify.com/s/files/1/0434/9794/7300/files/tuzefaxofosufotaxo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3030/6203/files/xatojetisajoserotafeliwag.pdf
    • https://cdn.shopify.com/s/files/1/0431/4578/9600/files/brave_frontier_guide_fusion.pdf
    • https://cdn.shopify.com/s/files/1/0428/3020/0991/files/shear_force_and_bending_moment_experiment.pdf
    • https://cdn.shopify.com/s/files/1/0436/0326/3645/files/fire_emblem_warriors_amiibo_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/5927/2090/files/mezukan.pdf
    • https://cdn.shopify.com/s/files/1/0432/3839/1970/files/86422824230.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_off000069e2.bin
6a9114bfb20581cb5b35b5b824d5dc369603a9f8a6be3922e827bd1b62b8b41a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69E2 5836 bytes
font_01_sfnt_off00007d98.bin
70bdda605486d55a8238d25ffd50188d3e476f3d7f4d023136579d028499f8b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D98 12064 bytes

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