Malicious PDF — malware analysis report

Static analysis result for SHA-256 e097e6de907fc7a1…

MALICIOUS

PDF

47.6 KB Created: 2020-08-29 03:37:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 282e83df4cc5068c34ae677371953486 SHA-1: 4bd7d460514bfa59b3113ab508143e6fb8440bee SHA-256: e097e6de907fc7a16f9f9249c5fe491fb160f280736b387bbddeb815112f12aa
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/wix?keyword=guitar+jam+tracks++free', suggesting a lure to download further content. The ML classifier strongly indicated maliciousness, and the PDF structure with numerous links aligns with SEO poisoning or link farm tactics to distribute malicious content.

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/wix?keyword=guitar+jam+tracks++free
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/74996678627.pdf
    • https://cdn.shopify.com/s/files/1/0434/1740/3549/files/nuletomemanizabuvuduf.pdf
    • https://cdn.shopify.com/s/files/1/0438/4745/0789/files/37916330100.pdf
    • https://cdn.shopify.com/s/files/1/0434/7405/9430/files/divinajifalojudijopikasi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0357/6481/files/wuzajofabipasofotora.pdf
    • https://cdn.shopify.com/s/files/1/0430/7199/6053/files/areas_de_asociacion_cerebral.pdf
    • https://cdn.shopify.com/s/files/1/0464/5493/1624/files/83018304592.pdf
    • https://cdn.shopify.com/s/files/1/0436/6503/1321/files/90083154845.pdf
    • https://cdn.shopify.com/s/files/1/0434/6501/5460/files/xitasafetofogekuvafujimol.pdf
    • https://cdn.shopify.com/s/files/1/0428/1162/1543/files/dasivoparebelikubuwenizil.pdf
    • https://cdn.shopify.com/s/files/1/0431/5014/7733/files/30866257148.pdf
    • https://cdn.shopify.com/s/files/1/0434/6213/1869/files/first_lego_league_jr_team_meeting_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/4885/3926/files/levugomuwaritub.pdf
    • https://static.usrfiles.com/ugd/b8c837_3c18c599f1804bd293cf5e7b71338cb3.pdf
    • https://static.usrfiles.com/ugd/b8c837_b0479c7f127641e4ad3f201af1d2d2d6.pdf
    • https://static.usrfiles.com/ugd/b8c837_8e2c78a851af4a08a5cf2b4aa5e31d22.pdf
    • https://static.usrfiles.com/ugd/b8c837_56e2a992cd1648e79a269c6445757132.pdf
    • https://static.usrfiles.com/ugd/b8c837_e83933a8ccff41bcb65acf3b89c9b470.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066b6.bin
98c60831ba331cbfe86234c7014303fbe8d58d495e3ddbf6cc5e3dfbed6ce070		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66B6 5168 bytes
font_01_sfnt_off0000783d.bin
1d31dd10da98a015316c56f7ceae78df02f39002e28185c321707f8e654077c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x783D 10428 bytes
font_02_sfnt_off00009c36.bin
15a68420f1c377824b8c1fd571ac7c30556db1b4bc05006bf44ec3f6c6c83208		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C36 16120 bytes

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