Malicious PDF — malware analysis report

Static analysis result for SHA-256 329f8db0e0d719ac…

MALICIOUS

PDF

51.1 KB Created: 2020-08-09 11:18:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0a272e4e8f7453d36eacabbf99f9525 SHA-1: 9e5a1590c4ed79b52e818bc849cb018973c7cedb SHA-256: 329f8db0e0d719acdd21bc31cddc5831176e9f9018c7ad9ab3074865999774db
150 Risk Score

Malware Insights

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

The PDF was flagged for containing a large number of external links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=analytical+mechanics+fasano+pdf', which is also listed as a malicious redirector. This suggests the document's primary purpose is to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=analytical+mechanics+fasano+pdf
    • http://xudax.bikramyogafremontstreet.com/uploads/1/3/2/7/132710712/8161598.pdf
    • http://sixogesal.brookeastonsings.com/uploads/1/3/0/9/130969426/426e98d.pdf
    • http://files.johnhandley.org/uploads/1/3/1/6/131636954/6057509.pdf
    • http://files.viewedwithgratitude.com/uploads/1/3/1/4/131453429/2ca1129cb.pdf
    • https://cdn.shopify.com/s/files/1/0434/4945/0661/files/2409210654.pdf
    • https://cdn.shopify.com/s/files/1/0429/5576/7967/files/wings_of_fire_book_1.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/all_formulas_of_math.pdf
    • https://cdn.shopify.com/s/files/1/0431/6109/2245/files/juzokekar.pdf
    • https://cdn.shopify.com/s/files/1/0429/1624/9767/files/rollable_table_roll20.pdf
    • https://cdn.shopify.com/s/files/1/0427/7587/1654/files/nuzologokinet.pdf
    • https://cdn.shopify.com/s/files/1/0430/2438/4154/files/shunt_capacitor_filter.pdf
    • https://cdn.shopify.com/s/files/1/0440/4091/3046/files/xupexonufaforivoguxuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/2210/6271/files/english_phonotactics.pdf
    • https://cdn.shopify.com/s/files/1/0438/7130/5883/files/3059828581.pdf
    • https://cdn.shopify.com/s/files/1/0430/3113/4365/files/23272992576.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
stream_005_off00009441.bin
ec9d3b161e9c0ae9f7de648fc6329c01770376abdd75bf4ccbf0fc62336a63a0		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9441 18208 bytes
font_00_sfnt_off00005f66.bin
73b6639b0729ee2b9f9cdef06a178aa191f87928eb8bafb15da5678e55097bae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F66 5180 bytes
font_01_sfnt_off000070da.bin
5db95058c59cac1b530eb7e5f82ccdab636ac524ab6e665dbfe9fbd58f1422fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70DA 10304 bytes
font_03_sfnt_off0000b102.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB102 4324 bytes

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