Malicious PDF — malware analysis report

Static analysis result for SHA-256 30396272a99d4968…

MALICIOUS

PDF

53.8 KB Created: 2020-08-21 16:15:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cbc2def0c23243627fb25f44d28ac795 SHA-1: f2dee1ca251bf944d5ef23d163c97d54b9b69605 SHA-256: 30396272a99d496871c038d5cdaf315c6ee733b7b5aeec0798e3ed877eb0e2b7
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains text suggesting a lure related to an 'Outlook signature template 2016'. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many of which point to potentially malicious or unrelated content, suggesting a spam or phishing campaign. The ML_NYX_PDF_MALICIOUS classifier strongly supports the malicious verdict.

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/pify?keyword=outlook+signature+template+2016
    • http://files.charmingfarminggoats.org/uploads/1/3/0/7/130775652/2f5ccf0.pdf
    • http://gesuvelur.chickenskauai.com/uploads/1/3/1/4/131453526/1b5edbdc5c.pdf
    • http://xamizena.chelmsfordosteopaths.com/uploads/1/3/2/7/132712207/vuwobomujurobefif.pdf
    • http://tipin.wundanookcreations.com/uploads/1/3/1/8/131858540/1826109.pdf
    • http://files.aspenridgeslavelake.com/uploads/1/3/1/3/131384573/2753184.pdf
    • https://cdn.shopify.com/s/files/1/0429/3653/3151/files/avg_pro_apk_latest_version.pdf
    • https://cdn.shopify.com/s/files/1/0435/6780/8667/files/siratikugojexavamel.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/75877947267.pdf
    • https://cdn.shopify.com/s/files/1/0430/2559/6573/files/45602694325.pdf
    • https://cdn.shopify.com/s/files/1/0435/1728/0408/files/dujufe.pdf
    • https://cdn.shopify.com/s/files/1/0434/2077/8653/files/xaparotaruzupumixebonevug.pdf
    • https://cdn.shopify.com/s/files/1/0431/6567/9776/files/53434566697.pdf
    • https://cdn.shopify.com/s/files/1/0436/8865/7049/files/dubewinasanodewa.pdf
    • https://cdn.shopify.com/s/files/1/0434/0737/6546/files/wow_classic_pvp_trinkets.pdf
    • https://cdn.shopify.com/s/files/1/0427/7259/4844/files/78621884333.pdf
    • https://cdn.shopify.com/s/files/1/0431/7937/6798/files/vlc_media_player_android_tv_apk.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5602/files/zuvemumimavesebe.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_off0000933f.bin
fdf1bdc8ec0449d1eb8d9ac8893fcc32615409a134b9714ba96f7e3e0adb7a3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x933F 5712 bytes
font_01_sfnt_off0000a698.bin
32a010c191cc87aac309cf263af9f5bc4880bdb1badc1deef839a8e3db1c7790		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA698 10420 bytes

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