Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fdae84c0940535b…

MALICIOUS

PDF

49.7 KB Created: 2020-08-21 00:24:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b67fe4250f85e6a943884ded1f8921f SHA-1: c3cd378f846ec78fa8841b43d217d7fe412db146 SHA-256: 7fdae84c0940535b94dec72edfe6629c062f390002dc39bae8981c580fc2d781
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains, including a known malicious redirector. The document body itself contains the URL 'https://ttraff.com/pify?keyword=new+alamein+city+pdf', which is flagged as malicious. This suggests a link farm or SEO poisoning attack designed to redirect users to 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.com/pify?keyword=new+alamein+city+pdf
    • http://pusijoji.michelleponeleit.com/uploads/1/3/0/8/130814411/5394670.pdf
    • http://files.mycph.info/uploads/1/3/2/6/132683228/bidut.pdf
    • https://cdn.shopify.com/s/files/1/0435/3789/1480/files/bekugubafajamat.pdf
    • https://cdn.shopify.com/s/files/1/0429/7929/5383/files/nawoxawagebipevozavij.pdf
    • https://cdn.shopify.com/s/files/1/0437/2204/7638/files/35053593503.pdf
    • https://cdn.shopify.com/s/files/1/0435/7003/6904/files/aseptic_techniques_in_microbiology.pdf
    • https://cdn.shopify.com/s/files/1/0428/7738/6911/files/lifemejaju.pdf
    • https://cdn.shopify.com/s/files/1/0432/9806/2501/files/43958245498.pdf
    • https://cdn.shopify.com/s/files/1/0439/2960/0168/files/english_calligraphy_font_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/7153/6290/files/perencanaan_laba_akuntansi_manajemen.pdf
    • https://cdn.shopify.com/s/files/1/0432/0460/8155/files/tizit.pdf
    • https://cdn.shopify.com/s/files/1/0428/6644/2406/files/89655475529.pdf
    • https://cdn.shopify.com/s/files/1/0440/1253/5958/files/werubulajiseronarotinopi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3355/8168/files/gojetavavagulokegim.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_off00005f01.bin
925d0781e1a75bd1dc953983608e32abd5dc4887fdf7fb3a848c4df437691cdb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F01 4868 bytes
font_01_sfnt_off00006f97.bin
f0f8f9c0e07fc0409f9736b24347808b5015afae7bde185ae24526b63d282752		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F97 10256 bytes
font_02_sfnt_off000092d1.bin
45622201d3df33bb94d06b259abc0bd5e469ea5b222cb04d8b335c0f2a0f78fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92D1 17208 bytes
font_03_sfnt_off0000abc2.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABC2 4324 bytes

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