Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0332d384dca441e…

MALICIOUS

PDF

52.6 KB Created: 2020-08-12 21:07:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fbf0307b26a043174df04ccb653c1ab2 SHA-1: 67b80ed9a7b416d5c163ba29f235fe357945aacd SHA-256: b0332d384dca441e1d283d022e11e939b65b74da0cbde49e6255522c861f7998
152 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically to 'https://ttraff.cc/pify?keyword=difficult+words+in+english+with+meaning+pdf'. The document body, though heavily obfuscated, also contains this URL, indicating a clear intent to lure victims. The ML classifier strongly supports the malicious nature of this PDF.

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=difficult+words+in+english+with+meaning+pdf
    • http://files.theamaniconsort.com/uploads/1/3/1/1/131164431/madadeguguta_kubekasifitoduv.pdf
    • http://files.richlawfirm.ca/uploads/1/3/1/4/131406950/e5d1ce7578f2831.pdf
    • http://files.thankfulrecords.com/uploads/1/3/0/9/130969809/kezudenuke-xokor-sipilivisipu.pdf
    • http://files.mabemi.net/uploads/1/3/1/6/131606003/vewomimimisa_tawozusidaberus_kosux.pdf
    • https://cdn.shopify.com/s/files/1/0433/0808/9509/files/38434214002.pdf
    • https://cdn.shopify.com/s/files/1/0438/1379/8050/files/goosebumps_abominable_snowman_of_pasadena.pdf
    • https://cdn.shopify.com/s/files/1/0428/4357/0343/files/43524877441.pdf
    • https://cdn.shopify.com/s/files/1/0432/4366/7616/files/waiting_for_godot_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/7759/1449/files/sims_2_hairstyles.pdf
    • https://cdn.shopify.com/s/files/1/0434/5744/6038/files/47009047418.pdf
    • https://cdn.shopify.com/s/files/1/0436/2646/3385/files/2797452714.pdf
    • https://cdn.shopify.com/s/files/1/0433/9875/8563/files/zobawepesetunubanesum.pdf
    • https://cdn.shopify.com/s/files/1/0429/9181/2767/files/vikaxegimife.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/vabomiru.pdf
    • https://cdn.shopify.com/s/files/1/0429/9436/8663/files/movizubedipilun.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_off00007d2b.bin
7604cfeb2c001e708a1062ab5d64f265e5910decfba0ecad8da73045a028e0dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D2B 5540 bytes
font_01_sfnt_off00008fe1.bin
a8c4033602c1d1e55864d087a9bea94226584d2fcc55290c32f8dfed8a3f52b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FE1 11892 bytes
font_02_sfnt_off0000b72f.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB72F 4324 bytes

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