Malicious PDF — malware analysis report

Static analysis result for SHA-256 09f1870946d9803d…

MALICIOUS

PDF

63.4 KB Created: 2020-08-14 04:18:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a53f7b739f1e4a89bb0f5ed71dc580c2 SHA-1: fb546eeda520f1287696f957e1fc93ef705da338 SHA-256: 09f1870946d9803dc786947ae32f9a1188a1933e82f51cae5ca0d903dbaf8482
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious redirectors or SEO link farms. The document body, though heavily obfuscated, contains a URL that leads to a redirector, suggesting an attempt to direct the user to malicious content. The ML classifier also strongly indicated maliciousness.

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=explore+learning+ionic+bonds+gizmo+answer+key
    • http://files.catheymccrary.com/uploads/1/3/1/0/131069978/27846ec.pdf
    • http://files.dorsethps.org.uk/uploads/1/3/2/7/132740277/9200710.pdf
    • http://pelap.edmondtreeservice.com/uploads/1/3/2/6/132681488/f946aa7.pdf
    • http://files.alanalight.com/uploads/1/3/1/4/131437983/kegixubo.pdf
    • http://files.u3ahavelocknorth.com/uploads/1/3/0/7/130776327/6cedc4dfa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9592/4640/files/wondershareelement_6_professional_crack.pdf
    • https://cdn.shopify.com/s/files/1/0430/6590/1210/files/buzuki.pdf
    • https://cdn.shopify.com/s/files/1/0432/2135/2606/files/2004_sportster_883.pdf
    • https://cdn.shopify.com/s/files/1/0438/3650/6272/files/price_action_trading_system.pdf
    • https://cdn.shopify.com/s/files/1/0446/5927/7987/files/autodwg_to_dwg_converter_keygen.pdf
    • https://cdn.shopify.com/s/files/1/0434/9827/4978/files/zopumunaxuduzedamebo.pdf
    • https://cdn.shopify.com/s/files/1/0429/3951/5039/files/ciclo_de_vida_de_las_angiospermas.pdf
    • https://cdn.shopify.com/s/files/1/0430/8788/8545/files/datojerivomopepiwivubi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3893/3146/files/38871319660.pdf
    • https://cdn.shopify.com/s/files/1/0432/4121/0024/files/38161541590.pdf
    • https://cdn.shopify.com/s/files/1/0432/0106/9220/files/63639373108.pdf
    • https://cdn.shopify.com/s/files/1/0437/0097/7818/files/zudovisiwijusaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rasebiv.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_off00009a98.bin
ce88eb79943e0aa2c55a8b6de50f7237c238aee1e5a8cc7c6486efe4234fc308		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A98 5864 bytes
font_01_sfnt_off0000ae98.bin
e82e9e33080f0b4c84dd7e85ac22d3f21d0013c24b6630529aa024c867ed57aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE98 13508 bytes
font_02_sfnt_off0000da7b.bin
43e84046d57c5d8edad47de9228ce36feb53c5e515436c294a71041590f3a3a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7B 16132 bytes

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