Malicious PDF — malware analysis report

Static analysis result for SHA-256 606832e850d242ff…

MALICIOUS

PDF

46.0 KB Created: 2020-08-06 14:42:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 819c5b6b7a688d7c2d1be111638a79bd SHA-1: 79d3619df89880c19d3c92816e6875dbdbfa01be SHA-256: 606832e850d242ff67c1d9a966e67991a7034bbc3c08b289b391667db5dfc53d
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of a 'download button' heuristic further supports the social engineering aspect of this attack. While no scripts were extracted, the link farm and redirector indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=airport+vocabulary+elementary+pdf
    • http://files.panamvetcorp.com/uploads/1/3/2/6/132681359/354642dc2329.pdf
    • http://files.coldbrewespresso.com/uploads/1/3/1/3/131382590/gavoxujas.pdf
    • http://files.desantedesigns.com/uploads/1/3/2/7/132712661/tovon_febekutivit_riduwar.pdf
    • http://files.donotreplymovie.com/uploads/1/3/1/6/131606175/suxupalobubex.pdf
    • http://files.mgridetoronto.com/uploads/1/3/0/9/130969185/125abfa619.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1800/2340/files/java_tutorial_javatpoint.pdf
    • https://cdn.shopify.com/s/files/1/0439/8976/2206/files/pharmaceutical_calculations_ansel.pdf
    • https://cdn.shopify.com/s/files/1/0441/4255/9384/files/zelozafuxevonibatexewe.pdf
    • https://cdn.shopify.com/s/files/1/0432/0234/7168/files/2291388757.pdf
    • https://cdn.shopify.com/s/files/1/0432/5254/7739/files/5713000701.pdf
    • https://cdn.shopify.com/s/files/1/0436/0624/5534/files/sujesolanulo.pdf
    • https://cdn.shopify.com/s/files/1/0436/9943/7721/files/92832308905.pdf
    • https://cdn.shopify.com/s/files/1/0433/6638/3768/files/cetoconazol_shampoo_medley_bula.pdf
    • https://cdn.shopify.com/s/files/1/0437/2506/2298/files/7259125870.pdf
    • https://cdn.shopify.com/s/files/1/0429/2309/8279/files/bamaluvuwofelapogivoxibe.pdf
    • https://cdn.shopify.com/s/files/1/0427/6954/7431/files/ruwilajusibovizem.pdf
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/befewifavuzi.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9079/files/bisovatawubilewoxeteja.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007472.bin
25d9bbfbffa0ce886bcc2b56304df4a15ca983606036f4e7dc0f621f695c0c54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7472 5412 bytes
font_01_sfnt_off000086d5.bin
a1445b0c3a4c828f7a1fbef2592a05445ddba307195f8ab8254a53e0b256c4e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86D5 10708 bytes

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