Malicious PDF — malware analysis report

Static analysis result for SHA-256 af42da08f3645064…

MALICIOUS

PDF

64.6 KB Created: 2020-08-11 13:58:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af7268b4f92202b28af0a5ffcd79eb78 SHA-1: 0d4dde73d387422322d35357e08d1781ad9fc483 SHA-256: af42da08f3645064afa6cce91a01953441fda5083802aea1b7229af9fda0115b
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm for SEO poisoning. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=asma+ul+husna+malayalam+pdf'. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted from this sample.

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.ru/pify?keyword=asma+ul+husna+malayalam+pdf
    • http://files.missionroadsdachurch.com/uploads/1/3/1/4/131438819/35a36b26c.pdf
    • http://files.jenniferrosewebster.com/uploads/1/3/1/8/131856435/f0f544827c05485.pdf
    • http://mapumi.bodyworkharmonics.com/uploads/1/3/2/6/132681556/penakevuvodire_fawaj_fasojuw_xutozomi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5763/5735/files/kadedaxajiwutipobexino.pdf
    • https://cdn.shopify.com/s/files/1/0434/0196/9820/files/zesubukovilutujivutenuzuv.pdf
    • https://cdn.shopify.com/s/files/1/0429/5521/0905/files/2_phones_lyrics_clean.pdf
    • https://cdn.shopify.com/s/files/1/0435/6512/1699/files/google_drive_reader.pdf
    • https://cdn.shopify.com/s/files/1/0434/2366/2236/files/88902605587.pdf
    • https://cdn.shopify.com/s/files/1/0427/7973/8278/files/fujetugajudasebojilalod.pdf
    • https://cdn.shopify.com/s/files/1/0438/2133/4690/files/maveriduzu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0642/7299/files/81819699966.pdf
    • https://cdn.shopify.com/s/files/1/0435/8068/6497/files/gemeviluvabol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pigirerunozekolufis.pdf
    • https://cdn.shopify.com/s/files/1/0433/0700/8168/files/oscillatory_motion.pdf
    • https://cdn.shopify.com/s/files/1/0431/6866/1670/files/kamonexof.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000c1c6.bin
bc779f2eb87730d2587db1d8352777b064c399e52b47a448ae35dd46b604ec00		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xC1C6 28960 bytes
font_00_sfnt_off00006c15.bin
e360eff424eebc3380701f7360e6257b5fcc5ceea54bd1a0a7f46853e4651e30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C15 5276 bytes
font_01_sfnt_off00007de7.bin
a777ec3c9c1809f0d851ab666b8e2a0385466f959ef2432958bbe52dd746c838		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE7 9108 bytes
font_02_sfnt_off00009cf5.bin
085d393bea79c2a90aff04af0338f4f49fd392ff8ad4bef2cdb0d063104a3bbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CF5 10788 bytes

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