Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6ff4807e7d8a4e7…

MALICIOUS

PDF

40.5 KB Created: 2020-08-14 05:27:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b420239fdd165399b171a3502cc6ad65 SHA-1: aceef16085624fd658f0300676800c8d946ee602 SHA-256: d6ff4807e7d8a4e798503ecab4d549b5fa9d13ed0c852989740863210aef9b17
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a software update for Acrobat Reader, aiming to trick users into clicking it. The document body and heuristics confirm the presence of this lure. The link redirects to a URL hosted on ttraff.cc, which is flagged as malicious. Additionally, the PDF contains a large number of SEO-optimized links pointing to various PDF files, likely for link farming or 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.cc/pify?keyword=acrobat+reader+9.+1free++for+windows+xp
    • http://xezefaxa.craigmorelocksmiths.com.au/uploads/1/3/1/4/131483068/zuvikidenobudaxoruru.pdf
    • http://rogokemob.helena-yang.com/uploads/1/3/1/6/131606027/witodikikev.pdf
    • http://files.crossroadsranchlucasiowa.com/uploads/1/3/1/3/131384401/tosozo.pdf
    • http://jimugib.uauto.solutions/uploads/1/3/1/0/131070722/biluzewi.pdf
    • http://files.mymakeitfit.com/uploads/1/3/1/4/131453022/bixaxika_nuvikikijelobif_volavenobu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8099/files/garmin_nuvi_2597lmt_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/8831/3506/files/sarujafobodewebidifani.pdf
    • https://cdn.shopify.com/s/files/1/0430/6753/9623/files/solikejokete.pdf
    • https://cdn.shopify.com/s/files/1/0428/2623/6063/files/45428780761.pdf
    • https://cdn.shopify.com/s/files/1/0427/5165/6102/files/bawisowe.pdf
    • https://cdn.shopify.com/s/files/1/0434/4184/8470/files/lumosar.pdf
    • https://cdn.shopify.com/s/files/1/0431/9261/5073/files/maparijolurix.pdf
    • https://cdn.shopify.com/s/files/1/0450/8942/3525/files/cessna_210_parts_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/4501/8017/files/powalikexakanuxupimofu.pdf
    • https://cdn.shopify.com/s/files/1/0428/7853/3788/files/kalozeneridifowenuzu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0586/2307/files/tibozeba.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_off00005e49.bin
b44af3a8e3c5a94ae0faf403fffe3a20ce2bbb1a3d45e9acd756aa72afb3eb84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E49 5644 bytes
font_01_sfnt_off000071a4.bin
c01b249be8b22798a6fb7bdc92c10787810edddfa7f7ba46963ca0ae8883b0fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71A4 10444 bytes

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