Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ace5290cfb07212…

MALICIOUS

PDF

42.9 KB Created: 2020-08-24 09:03:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a479a24082d77311b15d63f675ddeeca SHA-1: 03c5967f4e51c7613e6d1fd7ca51768454aa5efe SHA-256: 0ace5290cfb07212826dd420b4c28cf045c3033c38543e1454911fb9437d71a7
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 pointing to 'ttraff.com', which is further associated with a PDF link farm. The document body, though heavily obfuscated, contains text related to updating WhatsApp and a URL that appears to be part of the lure. The presence of numerous embedded links, many pointing to Shopify, suggests an attempt to obscure the malicious destination and potentially leverage benign-looking domains for distribution.

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=actualizar+whatsapp+2018+android
    • http://files.clipperoutlet.com/uploads/1/3/1/3/131381109/9633431.pdf
    • http://ledifaro.simplycreativetreasures.com/uploads/1/3/1/6/131606271/25a91937a.pdf
    • http://tunok.coachtbasketball.com/uploads/1/3/1/8/131855981/binelekevulid.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0436/9465/3595/files/alphabetizing_words_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/7016/8992/files/5385673234.pdf
    • https://cdn.shopify.com/s/files/1/0433/1254/5950/files/48686850064.pdf
    • https://cdn.shopify.com/s/files/1/0431/9235/2932/files/4335796548.pdf
    • https://cdn.shopify.com/s/files/1/0432/2027/1264/files/48546838471.pdf
    • https://cdn.shopify.com/s/files/1/0437/7473/8593/files/mofofakovuzizenifas.pdf
    • https://cdn.shopify.com/s/files/1/0430/4027/6642/files/70798770.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9290/files/5062926047.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/73524244278.pdf
    • https://cdn.shopify.com/s/files/1/0434/0717/9941/files/20440296358.pdf
    • https://cdn.shopify.com/s/files/1/0431/5709/4551/files/mizavaparozeniwovuvi.pdf
    • https://cdn.shopify.com/s/files/1/0428/8223/6583/files/78386490171.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b57.bin
d9fa93133ebe30bc2e17729ae608732bb4ac438259fac1d48c484cb254639af6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B57 5576 bytes
font_01_sfnt_off00006e52.bin
274bfa7f6635ed72a4112fe77b3428eeb834c00e2ba9fc74707ca20d54c83196		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E52 10068 bytes
font_02_sfnt_off000090b9.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90B9 4324 bytes

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