Malicious PDF — malware analysis report

Static analysis result for SHA-256 e620e546ddd447ba…

MALICIOUS

PDF

49.6 KB Created: 2020-08-30 18:01:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df039e7c2ad3bf5468862ff1c1788833 SHA-1: d08ca3f75bb3d41921268b30b472ba12f2d524a4 SHA-256: e620e546ddd447ba9653fef4d42c113c837db33a1131928e4a61fc777fa4204e
152 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for linking to malicious redirector infrastructure and for being part of a link farm. The primary malicious URL identified is https://ttraff.ru/wix?keyword=%25D8%25AF%25D8%25A7%25D9%2586%25D9%2584%25D9%2588%25D8%25AF+%25D9%2581%25DB%258C%25D9%2584%25D9%2585+barbie+spy+squad+2016, which is likely used to distribute further malicious content or conduct phishing. The document body, though heavily obfuscated, also contains this URL and numerous other links to Shopify domains, suggesting a coordinated effort 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=%25D8%25AF%25D8%25A7%25D9%2586%25D9%2584%25D9%2588%25D8%25AF+%25D9%2581%25DB%258C%25D9%2584%25D9%2585+barbie+spy+squad+2016
    • https://cdn.shopify.com/s/files/1/0431/7360/9636/files/73866412203.pdf
    • https://cdn.shopify.com/s/files/1/0436/4677/9552/files/fichier_svg_gratuit_pour_silhouette.pdf
    • https://cdn.shopify.com/s/files/1/0433/9341/7367/files/35690397216.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8428/files/giwamezarudabudef.pdf
    • https://cdn.shopify.com/s/files/1/0431/9870/9918/files/9894555506.pdf
    • https://static.usrfiles.com/ugd/6846fe_c22617cd916b4ea3b9a61818135aa2ff.pdf
    • https://static.usrfiles.com/ugd/b8c837_c1206fbd2697436f99aac9899033b8ba.pdf
    • https://static.usrfiles.com/ugd/286fb8_33d60e46fce9423e8479a9ccadfb186b.pdf
    • https://static.usrfiles.com/ugd/b8c837_5769e1b7c6f04deabef1f2ef0e60a801.pdf
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/how_to_screen_share_discord.pdf
    • https://cdn.shopify.com/s/files/1/0429/3676/2527/files/62045011891.pdf
    • https://cdn.shopify.com/s/files/1/0432/7813/9556/files/diploma_electrical_engineering_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0460/4126/8388/files/wijufowurosoderugexerema.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf8204b084274036b0933a571710e5af.pdf
    • https://static.usrfiles.com/ugd/b8c837_bb2dab041f91476bbe2e1167e20a9945.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005218.bin
a99a6554344408bf9cd7539d83a94443350164ea100acc3a02014ee746e1db17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5218 5260 bytes
font_01_sfnt_off000063f9.bin
dfbb805386e8f45942dd00c3bcc2f2f1341018051c73b580aed58c7990ba7852		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63F9 16940 bytes
font_02_sfnt_off00007c3a.bin
825b8f13e4b54e51ecc046bb4607d9ded72852275a426eb268133217bac46dde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C3A 14172 bytes
font_03_sfnt_off0000a8bb.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8BB 4324 bytes

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