Malicious PDF — malware analysis report

Static analysis result for SHA-256 017d19bc0bc22ee4…

MALICIOUS

PDF

49.0 KB Created: 2020-08-18 13:48:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 595842b3f45e064522fc1497ddf35fd8 SHA-1: aad69117e9d4f1aa647c905a89f85124f7f4726f SHA-256: 017d19bc0bc22ee481d3ff187424266c79e61d4cd881171d1e1a1563a2747375
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious File: Malicious File

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.cc) that is known to host malicious content. The document body, though heavily obfuscated, contains references to academic papers, suggesting a lure to trick users into clicking the malicious links. The ML classifier strongly indicated maliciousness, supporting the assessment of a phishing or redirection attack.

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=analogue+and+digital+communication+systems+pdf
    • http://files.phspiratescheer.org/uploads/1/3/2/8/132815045/182c55.pdf
    • http://revajeti.sandracowan.com/uploads/1/3/1/8/131872295/duvajeligoxef-viken.pdf
    • http://files.lindaheffler.com/uploads/1/3/1/6/131606392/niwizeja.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4343/0305/files/fubajilekolagadogeme.pdf
    • https://cdn.shopify.com/s/files/1/0434/2156/5078/files/22263957632.pdf
    • https://cdn.shopify.com/s/files/1/0429/2293/4435/files/99636485591.pdf
    • https://cdn.shopify.com/s/files/1/0430/1229/2767/files/31894359653.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jamitaribigonekadori.pdf
    • https://cdn.shopify.com/s/files/1/0434/3837/5074/files/jukirodos.pdf
    • https://cdn.shopify.com/s/files/1/0432/1548/7137/files/enterprise_architect_patterns.pdf
    • https://cdn.shopify.com/s/files/1/0434/3667/1132/files/bugasizixomum.pdf
    • https://cdn.shopify.com/s/files/1/0428/8079/4780/files/64033708271.pdf
    • https://cdn.shopify.com/s/files/1/0428/8797/0975/files/wesizerubogizena.pdf
    • https://cdn.shopify.com/s/files/1/0428/8138/4604/files/tatugojolalipedekuvu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2846/3271/files/gm_to_m.pdf
    • https://cdn.shopify.com/s/files/1/0448/3081/8461/files/pigoloj.pdf
    • https://cdn.shopify.com/s/files/1/0434/4040/6684/files/xagarovabepuzawabepusex.pdf
    • https://cdn.shopify.com/s/files/1/0431/7341/3028/files/zixofemelutonowa.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006740.bin
7553c70d2bf28018023ee96f9e873c39b920a0c50092f6082977cb19f91a05c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6740 5472 bytes
font_01_sfnt_off000079d8.bin
ef7ca917f003648cf8676ed96e3ec8827ec50db205a266fffe00ec9dbfce4329		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79D8 10084 bytes
font_02_sfnt_off00009c96.bin
683adbfdd17c9989673e1b74ed29acad364b7f771a4b9943d9668b60876446db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C96 17436 bytes

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