Malicious PDF — malware analysis report

Static analysis result for SHA-256 7442a568b5a0105d…

MALICIOUS

PDF

48.4 KB Created: 2020-08-24 02:04:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a802fbd0a6dc378464ea2b42e0ed3e18 SHA-1: 597907d265efe1158bf4c16e1c6b6d42d7bd2c23 SHA-256: 7442a568b5a0105db7b8ca249dc0f71514da8b1b04d54e798c19159ac7b8ef9e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm suggests an attempt to distribute malicious content or phish users. The document body, though heavily obfuscated, contains a URL that aligns with the malicious redirector finding.

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=wapking+new+bollywood+song+video
    • http://files.tennesseefccla.org/uploads/1/3/2/6/132696598/86efcb2270b0c.pdf
    • http://files.maccampusfrosh.com/uploads/1/3/1/3/131383247/kopelik.pdf
    • http://raxalabo.thelabdesigngroup.com/uploads/1/3/0/7/130775027/xezuwabefadofe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/0331/3315/files/auditing_principle_and_practice_1.pdf
    • https://cdn.shopify.com/s/files/1/0431/5188/4445/files/78602305364.pdf
    • https://cdn.shopify.com/s/files/1/0453/9475/5752/files/actual_vapour_compression_refrigeration_cycle.pdf
    • https://cdn.shopify.com/s/files/1/0431/0263/4148/files/75678092543.pdf
    • https://cdn.shopify.com/s/files/1/0431/4044/8407/files/upsc_sample_answer_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/6028/0982/files/pagbasa_ng_abakada.pdf
    • https://cdn.shopify.com/s/files/1/0429/3407/5558/files/2510987970.pdf
    • https://cdn.shopify.com/s/files/1/0437/1139/8041/files/besom.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bf5.bin
5546ccf5ad807e84c04086121efcaa1f62eeba1c9fbebebd76c5b7a684dabe71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BF5 5212 bytes
font_01_sfnt_off00006dca.bin
b2e465b17151f74569dd291f1f80a27ac414c1674229f50cec012317a95db647		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DCA 10412 bytes
font_02_sfnt_off0000918d.bin
6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x918D 16164 bytes
font_03_sfnt_off0000a6a2.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6A2 4324 bytes

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