Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f6efc6a0567ad5a…

MALICIOUS

PDF

113.8 KB Created: 2020-07-29 01:41:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75cb007320c50ac3a1a9be97b9da5ef8 SHA-1: 5034f920dafffe7d69d6267cb7570824855b01b4 SHA-256: 5f6efc6a0567ad5a1a970d73c91edf70a7c770674e53da9344295f0b95d1389e
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. It also contains a PDF_SEO_LINK_FARM heuristic, suggesting it's part of a link farm operation. The embedded URL https://ttraff.ru/pify?keyword=free+rpg+games+for+pc+no is the primary indicator of malicious intent, likely serving as a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.ru/pify?keyword=free+rpg+games+for+pc+no
    • http://files.lizromanek.com/uploads/1/3/0/8/130813782/1808551.pdf
    • http://files.rounduprealtyandbrokerage.com/uploads/1/3/1/4/131452861/6bec61f00d8b.pdf
    • http://files.beaconcoachingandtraining.com/uploads/1/3/0/9/130969424/lepeba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bixebor.pdf
    • https://cdn.shopify.com/s/files/1/0434/0216/6435/files/wijadisigukegevini.pdf
    • https://cdn.shopify.com/s/files/1/0431/8131/0114/files/waluxokikixuwakujiwivika.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5013/files/vapogasib.pdf
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/92059613787.pdf
    • https://cdn.shopify.com/s/files/1/0428/4288/2215/files/mipuko.pdf
    • https://cdn.shopify.com/s/files/1/0434/4994/2176/files/13674197914.pdf
    • https://cdn.shopify.com/s/files/1/0435/4031/6311/files/parotimidivalutuvige.pdf
    • https://cdn.shopify.com/s/files/1/0428/9832/5663/files/86945725763.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2297/files/7578542843.pdf
    • https://cdn.shopify.com/s/files/1/0431/6073/1808/files/70866606495.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_off00015c68.bin
27d5054226f5969e05e004a437dd878770dfa75a04464709b4f17fd0a953141e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15C68 3568 bytes
font_01_sfnt_off0001691f.bin
68e129c08def023f8257a5d09e3ed04817907f47bd0349b0b11d19e1c32bf223		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1691F 4920 bytes
font_02_sfnt_off000179b6.bin
4a0517385b7026b07a010b72927546c55cb87d6dfacebac1f2dce85de49ebda8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x179B6 10736 bytes
font_03_sfnt_off00019e28.bin
e1a62eaa7fd113b68df0b8d830b775b0d219ebdb1f7cd72f95e2b69aeb80dabb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19E28 17116 bytes

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