Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f17785cd8ce2285…

MALICIOUS

PDF

112.5 KB Created: 2020-08-08 01:40:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e33018296140e487335a1663061f6bfd SHA-1: c834302c7c32e24c8e6d7ad2fc1f6e00e52dcef2 SHA-256: 7f17785cd8ce22852403283f3ad42a2c141245e955b2119d9f8b38087a5e4936
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=surah+al+ankabut+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to disguise malicious content as a religious text to entice clicks. The ML classifier strongly supports the malicious nature of this PDF.

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.com/pify?keyword=surah+al+ankabut+pdf
    • http://vesom.mainedogtrainer.com/uploads/1/3/1/0/131070590/dowodewawo-begamosunoxu.pdf
    • http://files.edfwarbirds.com/uploads/1/3/0/7/130739227/jabezab.pdf
    • http://files.miniphysio.co/uploads/1/3/1/4/131407572/5941284.pdf
    • http://files.bossbattlegamesarcade.com/uploads/1/3/0/7/130775588/tusebugujukubimo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2626/7806/files/35345139703.pdf
    • https://cdn.shopify.com/s/files/1/0429/1123/6259/files/dazife.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/the_time_pandemonium.pdf
    • https://cdn.shopify.com/s/files/1/0433/1172/6750/files/1478832171.pdf
    • https://cdn.shopify.com/s/files/1/0434/6698/1542/files/57441877825.pdf
    • https://cdn.shopify.com/s/files/1/0434/1317/6469/files/83446053539.pdf
    • https://cdn.shopify.com/s/files/1/0439/1727/9400/files/72732015497.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/42099619717.pdf
    • https://cdn.shopify.com/s/files/1/0432/9095/1848/files/32646188926.pdf
    • https://cdn.shopify.com/s/files/1/0437/0399/2474/files/pisufunuxemelupasik.pdf
    • https://cdn.shopify.com/s/files/1/0444/2878/7878/files/scotts_push_mower.pdf
    • https://cdn.shopify.com/s/files/1/0430/5040/1943/files/logibupufo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6418/0390/files/javenijarexelejamuv.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00017aba.bin
02809568dda3d90e96845662ea0eccd6ff402837b47fd1f594fdf04160c61352		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x17ABA 33084 bytes
font_00_sfnt_off000140a7.bin
d4baf1b3b7a49fdf621c2659ffe01cb59649e47da408cb809312729b9c89f4b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x140A7 5256 bytes
font_01_sfnt_off0001527a.bin
f28949f2b1cb2e8df2a01a28da88f2a3f6138bfa76c7c4f32f7baef5ddfde0d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1527A 12580 bytes

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