Malicious PDF — malware analysis report

Static analysis result for SHA-256 063faafea6085071…

MALICIOUS

PDF

47.8 KB Created: 2020-08-08 21:25:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15817d7e966dccc8605c8c24570886e1 SHA-1: 52952a1a02c8011d105edefa5a890231de63195b SHA-256: 063faafea60850716058fc44257fc87a0cc7a2eb034ce18fb630daae64d5f322
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one identified as a malicious redirector, suggesting an attempt to lead the user to harmful content. The document body, though heavily obfuscated, contains a URL that appears to be a lure for interview answers, which is a common phishing pretext. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent.

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.cc/pify?keyword=tell+me+about+yourself+interview+answers+pdf
    • http://files.photoforanyoccasion.net/uploads/1/3/1/0/131070485/c9a2c018dcd.pdf
    • http://teputewi.clickfourhelp.org/uploads/1/3/1/4/131453041/punetipinilavulelo.pdf
    • http://files.rebeccabeaird.com/uploads/1/3/0/7/130739628/caf4a1.pdf
    • http://vamape.gayatriyogaacademy.com/uploads/1/3/2/6/132681670/musujilubotebid-lebifelofo-zipatojuv.pdf
    • http://files.dontdate-her.com/uploads/1/3/0/7/130775735/5584394.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/8222/7617/files/fuzixizun.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bifivejeg.pdf
    • https://cdn.shopify.com/s/files/1/0439/2737/1931/files/sanesapafoxafopaxavanemat.pdf
    • https://cdn.shopify.com/s/files/1/0438/2785/5517/files/330765705.pdf
    • https://cdn.shopify.com/s/files/1/0436/9724/2280/files/jofofowomowevumilupa.pdf
    • https://cdn.shopify.com/s/files/1/0429/3761/4499/files/nukodonetuxopigevagil.pdf
    • https://cdn.shopify.com/s/files/1/0433/0897/4235/files/53212032412.pdf
    • https://cdn.shopify.com/s/files/1/0438/2107/2546/files/shakespeare_quotes_on_life_lessons.pdf
    • https://cdn.shopify.com/s/files/1/0429/1887/1207/files/tijasemuzege.pdf
    • https://cdn.shopify.com/s/files/1/0431/3497/6157/files/wistron_astrosphere.pdf
    • https://cdn.shopify.com/s/files/1/0428/1804/4063/files/5426884769.pdf
    • https://cdn.shopify.com/s/files/1/0433/5583/2469/files/download_ios_9._3._2.pdf
    • https://cdn.shopify.com/s/files/1/0434/7291/2549/files/pifobapokobudapena.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_off00006e39.bin
51361cc216f52ef978ab887fcc252c459e0e112e210f25cfd776d7771f514bf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E39 5412 bytes
font_01_sfnt_off00008099.bin
3c1385a99dcefb311c5f7523b997e115c8b3c21b2e70ca61f69b8aa81073aca1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8099 10316 bytes
font_02_sfnt_off0000a3dd.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3DD 4324 bytes

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