Malicious PDF — malware analysis report

Static analysis result for SHA-256 7947cbedc02869e2…

MALICIOUS

PDF

49.8 KB Created: 2020-07-27 23:53:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2c1089a27d4602e641c8539672f838a SHA-1: d8e6c5be342eb57e71ac371ee587ed6242af68f4 SHA-256: 7947cbedc02869e2ea94278cbd775a6edc7e41d4d633f51db51a273ed27d6151
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body appears to be garbled, suggesting it's not intended for human consumption but rather to host these malicious links. The primary attack vector is likely social engineering via a malicious link within the 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=ingilizce+e%25C5%259F+ve+z%25C4%25B1t+anlaml%25C4%25B1+kelimeler+pdf
    • http://files.dalesdesignsonzazzle.com/uploads/1/3/0/7/130738562/f3c5b7d79b.pdf
    • http://files.champagnecircle.com/uploads/1/3/1/4/131406321/ca82345d8bfb.pdf
    • http://files.smsukltd.co.uk/uploads/1/3/1/4/131437283/mubaxokapur_fofom.pdf
    • http://files.wildsidedestinations.com/uploads/1/3/1/0/131069763/8480767.pdf
    • https://cdn.shopify.com/s/files/1/0431/5319/5157/files/32856959931.pdf
    • https://cdn.shopify.com/s/files/1/0437/0979/2407/files/gasaj.pdf
    • https://cdn.shopify.com/s/files/1/0437/4714/7928/files/tuvofubejivip.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lagikemirulufuwetore.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/faludutuvozaroda.pdf
    • https://cdn.shopify.com/s/files/1/0435/0427/1524/files/zurafase.pdf
    • https://cdn.shopify.com/s/files/1/0431/1711/7589/files/31989788650.pdf
    • https://cdn.shopify.com/s/files/1/0439/1819/6891/files/74748979756.pdf
    • https://cdn.shopify.com/s/files/1/0430/6714/6397/files/rupifal.pdf
    • https://cdn.shopify.com/s/files/1/0433/6143/5813/files/25437173080.pdf
    • https://cdn.shopify.com/s/files/1/0431/6296/0023/files/71244608430.pdf
    • https://cdn.shopify.com/s/files/1/0430/8454/6209/files/32719917757.pdf
    • https://cdn.shopify.com/s/files/1/0431/3917/0466/files/47953849124.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/
    • https://cdn.shopify.com/s/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f41.bin
f4a8875585735d05951212a5295ee32db2f08e864e16f4832c77435fa5db2f03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F41 5364 bytes
font_01_sfnt_off00008168.bin
dfab3945eace5ba27be1ad95d63d5142397767eab6bca27773794b33bda2302c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8168 1796 bytes
font_02_sfnt_off000089f2.bin
1d218fd9fa46d56c8b00f7166751ecf57c9a6c672769dbb081cb5aaa9d5fcc0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89F2 15068 bytes

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