Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad5bd3d392cc372c…

MALICIOUS

PDF

41.8 KB Created: 2020-07-10 07:56:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15d5ab407fd1142300600a067b18b7b1 SHA-1: ef735e711153d551cf7b63838e68d98157192664 SHA-256: ad5bd3d392cc372cc1ccc7e8f2a1d39ae185497e4e5060bbe36c08696c2682d4
152 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to SEO-optimized PDF lures. The primary link, 'https://ttraff.com/wb?keyword=converter%20jpeg%20em%20pdf%20on%20line', is identified as a malicious redirector. The document's content and structure strongly suggest a phishing or scam attempt, aiming to direct users to malicious websites.

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.com/wb?keyword=converter%20jpeg%20em%20pdf%20on%20line
    • http://files.mhecblacon.com/uploads/1/3/1/4/131437351/vasak.pdf
    • http://files.stmarysofthelakeff.com/uploads/1/3/0/7/130739419/neralivodup.pdf
    • http://files.hssapro.com/uploads/1/3/1/4/131437376/6633733.pdf
    • http://files.thetechnicolorsheep.com/uploads/1/3/0/7/130739201/7935b2c61a8df.pdf
    • http://files.hammeriefarm.com/uploads/1/3/2/6/132682565/8671ab9e.pdf
    • http://files.fringeelectronics.com/uploads/1/3/1/3/131382032/dbe17cf88d0.pdf
    • http://files.allezmag.co/uploads/1/3/1/3/131379035/5788381.pdf
    • http://files.arthousestudios.com.au/uploads/1/3/0/8/130813546/lonegovuzakug.pdf
    • http://files.nileinstitute.org/uploads/1/3/1/1/131163920/zidetaxes-fofisidomawatug-mojolimipananav-gokepem.pdf
    • https://fotifumiwo.files.wordpress.com/2020/06/botewejifaranunajaz.pdf
    • https://fugudep.files.wordpress.com/2020/07/depabeviribo.pdf
    • https://tigizenawa.files.wordpress.com/2020/06/difoxijidubotiwazebo.pdf
    • https://vudiguxop.files.wordpress.com/2020/07/71428062770.pdf
    • https://jakasizox.files.wordpress.com/2020/06/43627359633.pdf
    • https://vodupabaneze.files.wordpress.com/2020/07/43602045151.pdf
    • https://dedovirap.files.wordpress.com/2020/06/67073102485.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gibowutobarifokegibig.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kemisavixazesunomezixe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fupibi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nitopufekuriwuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nalekubaserigudopen.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/golizikedakumeru.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c91.bin
d29c693e15334e805c444846dc6ffabf848413f08618a67d77d5dbd79fa43366		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C91 4920 bytes
font_01_sfnt_off00006d42.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D42 1800 bytes
font_02_sfnt_off000075d0.bin
a61406c9ae17f96eaddec02e814724658c98260dab7bb05a4e868121c392cf4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75D0 10548 bytes

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