Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a1b6ea456f663f7…

MALICIOUS

PDF

51.7 KB Created: 2020-08-03 18:04:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cce1ddb8b9209a69d1360634d8adb760 SHA-1: 3de1cdc1e104dce0003426eb18aeea59ee5ef6b1 SHA-256: 6a1b6ea456f663f7378e34aa9169e7fc8513ac4419c22ac764ec236f69efb562
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of links, many pointing to benign Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text that, when combined with the heuristic firings, indicates an advance-fee scam lure. The primary malicious URL identified is https://ttraff.com/pify?keyword=carian+cole+no+tomorrow+pdf, which is likely used to redirect the user to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=carian+cole+no+tomorrow+pdf
    • http://files.christinebrumbaughdesign.com/uploads/1/3/2/6/132682039/9752192.pdf
    • http://files.yogaskies.net/uploads/1/3/0/8/130815026/jezinelesepo.pdf
    • http://files.danielleharth.com/uploads/1/3/1/8/131871938/1073206.pdf
    • http://files.newfoundlandclubofnsw.com/uploads/1/3/2/6/132682171/7056080.pdf
    • http://files.handsofjoyforthedeaf.com/uploads/1/3/2/3/132303339/7404985.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0921/1549/files/denevinakakis.pdf
    • https://cdn.shopify.com/s/files/1/0431/0990/8637/files/poperuwabupotixef.pdf
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/xageradasidusesasad.pdf
    • https://cdn.shopify.com/s/files/1/0433/8240/7335/files/88272361310.pdf
    • https://cdn.shopify.com/s/files/1/0429/6350/1222/files/66302908331.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/85774114955.pdf
    • https://cdn.shopify.com/s/files/1/0435/0138/7936/files/pesepo.pdf
    • https://cdn.shopify.com/s/files/1/0438/3404/8669/files/golujilamaxemodu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/nilawunujekikifizuzarowi.pdf
    • https://cdn.shopify.com/s/files/1/0429/3672/9766/files/74439322948.pdf
    • https://cdn.shopify.com/s/files/1/0434/2104/0792/files/73715119154.pdf
    • https://cdn.shopify.com/s/files/1/0435/1908/2651/files/lewiruka.pdf
    • https://cdn.shopify.com/s/files/1/0440/3943/8486/files/pokemon_sun_and_moon_animated_sprites.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008c34.bin
9cb788c710130d79c9af777d69524a304607e379d0d4863127bc795a32501799		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C34 5120 bytes
font_01_sfnt_off00009d9e.bin
03ea3b4998aa245ba350f343357b658a8672205520f017036c6addb0f3f88bed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D9E 10588 bytes

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