Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d83e5b58db81548…

MALICIOUS

PDF

47.3 KB Created: 2020-08-07 23:04:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e58877ccc70ac1ee2fcf6af24c29229f SHA-1: a6771ca10cc432d98e07a11885ccfbdb8e86f119 SHA-256: 3d83e5b58db81548ca2c366dab3283540cc4d1ce7ef60e75dde8677f3b8c45eb
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=carte+du+monde+%25C3%25A0+imprimer+format+a4+pdf'. The document body, though heavily obfuscated, contains text related to printing a world map, suggesting a lure. The presence of a link farm and the ML classifier's high confidence further support malicious intent, likely for phishing or malware distribution.

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=carte+du+monde+%25C3%25A0+imprimer+format+a4+pdf
    • http://files.polishmaids4you.com/uploads/1/3/1/3/131383456/nokeketig_gorivotumore_tofinizewovapal.pdf
    • http://pigol.stepswithrollo.com/uploads/1/3/1/0/131071157/kiwavimabo.pdf
    • http://files.bepowerpositive.org/uploads/1/3/0/9/130969402/7018831.pdf
    • http://files.deathcog.com/uploads/1/3/1/3/131379594/tamimukako.pdf
    • http://larusir.yvettephotography.co.uk/uploads/1/3/1/3/131379730/7456643.pdf
    • https://cdn.shopify.com/s/files/1/0434/2589/0469/files/62118868998.pdf
    • https://cdn.shopify.com/s/files/1/0429/8362/0757/files/cambridge_advanced_english_practice_tests.pdf
    • https://cdn.shopify.com/s/files/1/0434/0868/7269/files/14451381612.pdf
    • https://cdn.shopify.com/s/files/1/0430/4646/9793/files/49711469136.pdf
    • https://cdn.shopify.com/s/files/1/0433/6268/0984/files/45688484656.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/5989/files/nimokezexinofokedozag.pdf
    • https://cdn.shopify.com/s/files/1/0430/4293/0842/files/bejujozutaxuzofef.pdf
    • https://cdn.shopify.com/s/files/1/0433/4832/8603/files/47776082909.pdf
    • https://cdn.shopify.com/s/files/1/0430/7383/1066/files/tipofujoforakosuxosibul.pdf
    • https://cdn.shopify.com/s/files/1/0428/2223/8374/files/5983637660.pdf
    • https://cdn.shopify.com/s/files/1/0430/4135/7973/files/jogasusukoliwetalixi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5573/files/42415116187.pdf
    • https://cdn.shopify.com/s/files/1/0428/4622/4540/files/lagodelazil.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_off000066df.bin
289c7dc60e2131e9e8a5de25c54fad595d89379f292b56694f5ac10d3007e675		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66DF 5204 bytes
font_01_sfnt_off000077f8.bin
482c10a8cb784aaa4af69f83438e18b06b24392812c0516de3cddc106babe6e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77F8 12696 bytes
font_02_sfnt_off00009f8d.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F8D 4324 bytes

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