Malicious PDF — malware analysis report

Static analysis result for SHA-256 9662d884d3fe20d8…

MALICIOUS

PDF

115.4 KB Created: 2020-08-18 19:30:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e8d7309304f68c336fe2e50142698a9 SHA-1: 4802c9eab269e450df32223e99658ca7cb915dbb SHA-256: 9662d884d3fe20d877c6a31bb5a0acbc5b77628490cfcd474210c79b107b9e60
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.001 Malicious Link

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though partially corrupted, contains the text 'Apj abdul kalam full form in tamil' and a URL pointing to 'ttraff.com', indicating a lure to a malicious site. The 'PDF_SEO_LINK_FARM' heuristic further suggests the document is part of a larger scheme to distribute malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=apj+abdul+kalam+full+form+in+tamil
    • http://wezoboz.fossi-images.com/uploads/1/3/1/6/131636725/varipari.pdf
    • https://cdn.shopify.com/s/files/1/0434/2031/9893/files/51265290030.pdf
    • https://cdn.shopify.com/s/files/1/0427/9202/6271/files/top_reader_android.pdf
    • https://cdn.shopify.com/s/files/1/0431/1715/0357/files/kewikegotisoxatidi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6107/6375/files/pitebunewilad.pdf
    • https://cdn.shopify.com/s/files/1/0433/0497/6548/files/32273084507.pdf
    • https://cdn.shopify.com/s/files/1/0448/1184/5793/files/carrots_and_sticks.pdf
    • https://cdn.shopify.com/s/files/1/0438/0858/7936/files/annemarie_schimmel_muhammad.pdf
    • https://cdn.shopify.com/s/files/1/0427/5296/6812/files/attack_on_titan_ost_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/1280/0159/files/catia_basic_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0434/5475/9065/files/43510159792.pdf
    • https://cdn.shopify.com/s/files/1/0430/5669/3397/files/23576531299.pdf
    • https://cdn.shopify.com/s/files/1/0427/8062/3015/files/xisaru.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013281.bin
d541c75e4a763e27490a699a7b4c658351cd4b467900bce334d511196932196e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13281 11336 bytes
font_01_sfnt_off0001578f.bin
1f8eeb341cb7a88573fdfd230ca93b233b113754df6e0955e5707634f577aa5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1578F 5044 bytes
font_02_sfnt_off0001688d.bin
9280403db059c97ed2593078f6f200fc32800adcff297a73272d767702ab96e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1688D 3448 bytes
font_03_sfnt_off000175fb.bin
2020b91bdd68769dba13687b5c3b489529880305ebaf2178569cbd1142a0180f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x175FB 11136 bytes
font_04_sfnt_off00019bf1.bin
ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19BF1 16164 bytes
font_05_sfnt_off0001b10a.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B10A 4324 bytes

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