Malicious PDF — malware analysis report

Static analysis result for SHA-256 6573ec5e053b6aa8…

MALICIOUS

PDF

116.7 KB Created: 2020-08-02 19:12:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 587069428545158087fe371fd0496b10 SHA-1: 6b9b15ca4098df58659b22da8e453e4687bf8852 SHA-256: 6573ec5e053b6aa84ec588a3473e490bd4d6fc9f763449edc0bc10b2d14fa2f0
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector infrastructure at ttraff.com. The document body, though partially corrupted, suggests a lure related to a "2016 kia sorento owners manual". The presence of numerous external PDF links, many pointing to Shopify, indicates a potential link farm or content distribution network used to host malicious files. The ML classifier strongly flagged this PDF as malicious.

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=2016+kia+sorento+owners+manual
    • http://files.pacehighchoir.com/uploads/1/3/1/8/131871891/2056809.pdf
    • http://files.sddragonboatrace.com/uploads/1/3/1/4/131438676/takebexitob.pdf
    • http://files.savannahbrooklynharrell.com/uploads/1/3/1/3/131398133/90773925ee6.pdf
    • http://files.petersburgchurchofchrist.org/uploads/1/3/0/7/130775282/panimisalavotopab.pdf
    • http://files.froghappy.com/uploads/1/3/2/7/132741322/2010b7b9d8e2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/6616/9246/files/nunili.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9079/files/97127296772.pdf
    • https://cdn.shopify.com/s/files/1/0436/0149/4178/files/guwelediraxurazaki.pdf
    • https://cdn.shopify.com/s/files/1/0430/7196/3296/files/puzizesukubesapuwu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/lotupizedu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lubogalevomiwubojaxijafax.pdf
    • https://cdn.shopify.com/s/files/1/0435/7393/6291/files/velatigale.pdf
    • https://cdn.shopify.com/s/files/1/0431/8652/0224/files/gikaxumirefipederibut.pdf
    • https://cdn.shopify.com/s/files/1/0440/3471/9909/files/zineweduwodakideja.pdf
    • https://cdn.shopify.com/s/files/1/0431/8524/2276/files/1624111549.pdf
    • https://cdn.shopify.com/s/files/1/0429/3437/0470/files/98021893374.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25696514874.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_off00015f09.bin
8a15ec662a1228a456dba6d0305b4e550e36f8f982e90bc6a966caaffbe060fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15F09 3460 bytes
font_01_sfnt_off00016b8d.bin
44223640ff159bf50c074e2b2f0b8605e20f1eadc22b7e643e07d145c66030d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16B8D 5372 bytes
font_02_sfnt_off00017dd3.bin
6f15984fa994534ed69004b44cee483fd9605e69c83f58571dd73bc753c9fb4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17DD3 15940 bytes
font_03_sfnt_off0001af9d.bin
2186bc0270c466fad7238e9ef6d9d2fcc0a79578cd5ee8051447860e95598cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AF9D 16148 bytes

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