Malicious PDF — malware analysis report

Static analysis result for SHA-256 2168526e08ca389d…

MALICIOUS

PDF

45.1 KB Created: 2020-08-18 18:44:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc2960f670557cd492fc7578a292664a SHA-1: 9ed43e07874692cc6246e7e9552b2f81061927e3 SHA-256: 2168526e08ca389d931e4db746735975f335c9f61f3e87d239d2d398d4955052
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=hugoton+royalty+trust+annual+report', suggesting a lure to a malicious site. The ML classifier also flagged this PDF as malicious with high confidence.

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=hugoton+royalty+trust+annual+report
    • http://nupiga.livinglightwellness.com/uploads/1/3/1/6/131606575/jagakuxa-vetire.pdf
    • http://files.officialmyrtlebeachsports.com/uploads/1/3/1/6/131606165/xarasi_gabelef.pdf
    • http://files.shangrilayoga.com/uploads/1/3/1/4/131483138/katasoz.pdf
    • http://sowuzifog.gettheswitch.com/uploads/1/3/1/4/131455463/biloxumiwok-sexovagifi-kilewaxababijuw-rulul.pdf
    • http://rudob.yubaizhou.com/uploads/1/3/1/3/131379362/kolesidisudu_banezevirunizu_pamib.pdf
    • https://cdn.shopify.com/s/files/1/0432/9334/3902/files/sasipamawip.pdf
    • https://cdn.shopify.com/s/files/1/0433/4570/7162/files/begovexutubupaponage.pdf
    • https://cdn.shopify.com/s/files/1/0437/1090/6518/files/biodegradable_plastic_manufacturing_process.pdf
    • https://cdn.shopify.com/s/files/1/0431/2258/9853/files/zevosisazuronusesu.pdf
    • https://cdn.shopify.com/s/files/1/0433/2247/4651/files/tukapaka.pdf
    • https://cdn.shopify.com/s/files/1/0431/2553/8980/files/79243450702.pdf
    • https://cdn.shopify.com/s/files/1/0433/1061/2644/files/48282068452.pdf
    • https://cdn.shopify.com/s/files/1/0435/0545/1174/files/national_budget_definition.pdf
    • https://cdn.shopify.com/s/files/1/0435/8550/3393/files/dingbats_20_answers.pdf
    • https://cdn.shopify.com/s/files/1/0427/9359/9132/files/balancing_chemical_equations_worksheet_9th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0435/2793/0011/files/feludibujilabad.pdf
    • https://cdn.shopify.com/s/files/1/0440/6480/0918/files/mofufupurozafimokififo.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006aa2.bin
78936808ddff9d3c879f4227600e27a742931c9d7b924aab99304a4a90858d6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA2 5048 bytes
font_01_sfnt_off00007be5.bin
7162958ad81bd2e5163e5e14244f70e7959800e1b3ae5b04298329fcb34a424a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BE5 13668 bytes

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