Malicious PDF — malware analysis report

Static analysis result for SHA-256 41afe6ecff808e81…

MALICIOUS

PDF

44.5 KB Created: 2020-08-17 03:57:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3c2c9a8fe8eb20dea45098b2b97f153 SHA-1: 436bbd95815179c55ac90d9fc5e906babe41f0c9 SHA-256: 41afe6ecff808e8189069a89530d20f548260e906dac3cef712f4d2e462b8792
150 Risk Score

Malware Insights

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

The PDF contains numerous links, including a critical malicious redirector link to 'ttraff.com'. The document body, though heavily obfuscated, contains the string 'Types of nematodes pdf' and the URL 'https://ttraff.com/pify?keyword=types+of+nematodes+pdf', suggesting a lure to disguise malicious activity. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm used to obscure the malicious redirector.

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=types+of+nematodes+pdf
    • http://files.okemossoccer.org/uploads/1/3/1/6/131606343/kusavodisonosej_pujoxesepi_mesunefixiw_vifujuduxuv.pdf
    • http://denaxaxu.stevewelchcreative.com/uploads/1/3/0/8/130873851/weveparunifeji-kupoj-kaferabe-kanojeradajo.pdf
    • http://vozox.sinisterkiss.com/uploads/1/3/2/6/132682051/gelezuborakixiko.pdf
    • http://files.justuslipsius7.com/uploads/1/3/0/8/130814058/582307.pdf
    • https://cdn.shopify.com/s/files/1/0430/0190/5315/files/low_oxalate_foods_list.pdf
    • https://cdn.shopify.com/s/files/1/0431/8016/3232/files/beveiligde_toch_printen.pdf
    • https://cdn.shopify.com/s/files/1/0438/3437/6352/files/circumference_of_an_ellipse.pdf
    • https://cdn.shopify.com/s/files/1/0428/5333/5207/files/luzuxij.pdf
    • https://cdn.shopify.com/s/files/1/0435/1174/2628/files/jukipaxigudo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9469/5329/files/ligitewuxufuzibakitos.pdf
    • https://cdn.shopify.com/s/files/1/0434/5266/1912/files/79710263510.pdf
    • https://cdn.shopify.com/s/files/1/0431/6859/6117/files/86256720259.pdf
    • https://cdn.shopify.com/s/files/1/0432/7279/8373/files/mudepikupusamotip.pdf
    • https://cdn.shopify.com/s/files/1/0429/3450/1535/files/tabakera.pdf
    • https://cdn.shopify.com/s/files/1/0434/4971/2806/files/37390771133.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_off000070af.bin
bb83c47ae497878a1141404200fa4079fd2e2bdcc71396e1ccb3d5dbacdc2162		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70AF 5108 bytes
font_01_sfnt_off00008209.bin
be3ede1d1f2eac3bea07d68594c0136de0aec3ae2a31cc8576a32ec3368cde32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8209 10348 bytes

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