Malicious PDF — malware analysis report

Static analysis result for SHA-256 8207d92667fad620…

MALICIOUS

PDF

49.7 KB Created: 2020-08-18 18:04:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d1f152f758b064287a6f1d6189a810a SHA-1: 350e125697293fec87ccf458036941a4b2d827f9 SHA-256: 8207d92667fad6204d4163da08bbf557cd38aea1a8429acc6efc2ac8acc587a6
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious content. The document body, though heavily obfuscated, contains this URL and appears to be a lure for users to click on it. The presence of numerous other PDF links suggests a link farm or a method to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.cc/pify?keyword=economist+style+guide+2019
    • http://fuzexura.sand.penguinprof.com/uploads/1/3/2/6/132682883/tatowelafife.pdf
    • http://xuneludun.naturallymusicalstudio.com/uploads/1/3/0/8/130874633/7524049.pdf
    • http://puxabede.celebraterecoverycb.com/uploads/1/3/1/3/131398367/vagum.pdf
    • http://files.pinningdownclouds.com/uploads/1/3/0/7/130776346/2334507.pdf
    • http://files.kristaparrpainting.com/uploads/1/3/2/3/132303307/zewik.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/7178/9469/files/46332163436.pdf
    • https://cdn.shopify.com/s/files/1/0432/9363/8822/files/47868260339.pdf
    • https://cdn.shopify.com/s/files/1/0434/6380/3046/files/devirarenadijuvujone.pdf
    • https://cdn.shopify.com/s/files/1/0433/3876/0342/files/dutuxukokexagamekupupaxo.pdf
    • https://cdn.shopify.com/s/files/1/0441/0490/8952/files/naxozezozatobudewuxonigod.pdf
    • https://cdn.shopify.com/s/files/1/0429/3243/7158/files/28879589487.pdf
    • https://cdn.shopify.com/s/files/1/0433/5733/9813/files/asamblea_constituyente_ecuador.pdf
    • https://cdn.shopify.com/s/files/1/0431/4457/7178/files/lowaviragatawezogupixani.pdf
    • https://cdn.shopify.com/s/files/1/0431/6912/0413/files/84820786270.pdf
    • https://cdn.shopify.com/s/files/1/0433/9430/2115/files/pharmacy_technician_resume.pdf
    • https://cdn.shopify.com/s/files/1/0428/7456/8860/files/polobezitodowikugaxitisu.pdf
    • https://cdn.shopify.com/s/files/1/0439/4447/6840/files/jowopam.pdf
    • https://cdn.shopify.com/s/files/1/0429/5580/0732/files/mac_preview_annotate.pdf
    • https://cdn.shopify.com/s/files/1/0431/9058/3464/files/tetapa.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_off00007553.bin
b649dd6bd913a6bde70861c6658d57c31b5123fa123466e43c428fa47b07c0c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7553 5492 bytes
font_01_sfnt_off000087fa.bin
f70614a274c646020ec456755cd294b28f0957777b7a41fc8b6fb8178c9ee513		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87FA 15948 bytes

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