Malicious PDF — malware analysis report

Static analysis result for SHA-256 edb0870827b4e1e4…

MALICIOUS

PDF

46.2 KB Created: 2020-08-10 10:22:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7bbca8aa3cd23fcf1151f1e35dd77c0 SHA-1: c2d3ce2d27941889b49930a185ba1a1aa1be679f SHA-256: edb0870827b4e1e415ff84b463064ff5821d0b041e7f47a5dceaedb5ef6f26c3
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm and a critical redirector link pointing to ttraff.ru, indicating a lure to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. The document body contains obfuscated text and the target URL, suggesting an attempt to trick users into downloading a file via a deceptive link.

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.ru/pify?keyword=wedding+couple+poses+pdf+download
    • http://files.cottageglenglimpses.com/uploads/1/3/2/6/132695200/sibewebita.pdf
    • http://files.liespress.com/uploads/1/3/1/4/131438059/jeduk.pdf
    • http://files.campcrescentmoon.org/uploads/1/3/0/7/130739809/nabujelalis-xeropedulupo-kivojafirisuvi-mufekajutugiwi.pdf
    • http://files.oregondunestriathlon.com/uploads/1/3/1/1/131163687/3381376.pdf
    • http://xutojupu.timmietattoo.com/uploads/1/3/1/8/131872269/fapuvigizamalikite.pdf
    • https://cdn.shopify.com/s/files/1/0430/6337/8081/files/rutifaverivobagi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8856/6680/files/vozabuvegorofa.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/xusotibiriwijedatebas.pdf
    • https://cdn.shopify.com/s/files/1/0432/2826/6654/files/fipewedagasupena.pdf
    • https://cdn.shopify.com/s/files/1/0436/2780/6883/files/vizumakajetoporilibut.pdf
    • https://cdn.shopify.com/s/files/1/0429/4865/7311/files/8498229961.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5965/files/tevimi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1769/1559/files/arduino_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/2626/7806/files/panudabexupivunemubun.pdf
    • https://cdn.shopify.com/s/files/1/0431/4624/8358/files/39564981652.pdf
    • https://cdn.shopify.com/s/files/1/0433/2745/5400/files/pifefazatepuguxigik.pdf
    • https://cdn.shopify.com/s/files/1/0433/5806/0703/files/canvas_draw_circles.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/
    • https://cdn.shopify.com/s/files/1/0436/2780/6883/files/vizumaka

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072d3.bin
3e7242db3bef6239cb3d7098a119d4c9d10706791da90aea42b9bafa1964fe00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72D3 5332 bytes
font_01_sfnt_off00008530.bin
236410e046756f868420febcdc7118493abd02f0cc47231e6f17fb92e18a8efb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8530 11656 bytes

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