Malicious PDF — malware analysis report

Static analysis result for SHA-256 85c0ed9a277b224c…

MALICIOUS

PDF

41.9 KB Created: 2020-08-12 00:10:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c42133e1eda30a35cce41d868e0bbf1d SHA-1: b486f17a15ece5ca70d2db6cd1137ae52988da64 SHA-256: 85c0ed9a277b224cf64c9bc44b7faf3c066a48ee87fa563042b5469e26a4971b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text that, combined with the 'SE_ADVANCE_FEE_SCAM_LURE' heuristic, indicates a classic advance-fee fraud scheme. The primary malicious URL identified is ttraff.com, which likely serves as a gateway to further malicious content or phishing pages.

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=carcassonne+gold+rush+pdf
    • http://dedosiwig.daniellegaffen.com/uploads/1/3/0/8/130814229/5272336.pdf
    • http://files.nineblamassu.com/uploads/1/3/1/4/131452982/dokunifujonebut_solifosimexikex_dadugoxo.pdf
    • http://vevaf.theboysbarkingbakery.com/uploads/1/3/0/7/130775162/a90f4ada3370.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/1701/7256/files/22855601748.pdf
    • https://cdn.shopify.com/s/files/1/0434/4456/8220/files/81049106645.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9805/files/44581728565.pdf
    • https://cdn.shopify.com/s/files/1/0435/2966/6724/files/97932825878.pdf
    • https://cdn.shopify.com/s/files/1/0433/4003/8302/files/kukawusubobofofaporoja.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19227598733.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/44839761876.pdf
    • https://cdn.shopify.com/s/files/1/0434/6413/0725/files/14097386091.pdf
    • https://cdn.shopify.com/s/files/1/0428/1643/8438/files/mavodukafuditagalatetu.pdf
    • https://cdn.shopify.com/s/files/1/0434/9739/0244/files/kokupubusilevetepamu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/ibm_lotus_viewer.pdf
    • https://cdn.shopify.com/s/files/1/0432/6139/5102/files/64291652317.pdf
    • https://cdn.shopify.com/s/files/1/0439/7803/1262/files/22070354497.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_off000063e1.bin
f3d270ff005a15c027f1e1b8e3d00fc1648a026bf9cc58548acacc03e4f109ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63E1 5320 bytes
font_01_sfnt_off000075f0.bin
524689cf38e4649b99e3c17efb89641d11844b98274200526f7ff26cc94b492e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75F0 10724 bytes

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