Malicious PDF — malware analysis report

Static analysis result for SHA-256 a85b7f0fc5008d64…

MALICIOUS

PDF

42.2 KB Created: 2020-08-03 21:21:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13f508a13430225e0e162476bcbbdb4b SHA-1: c83b44253901bb9b11bf4e0053b0ad95c5a690dd SHA-256: a85b7f0fc5008d64ef2fa4eefafd6ad42cf5960573274b44b251b0beed81e6a3
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of the primary links, 'https://ttraff.com/pify?keyword=medicinal+and+aromatic+plants+cultivation+pdf', is flagged as a malicious redirector. This suggests the document is designed to lead users to malicious sites through a link farm, likely for phishing or malware distribution.

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=medicinal+and+aromatic+plants+cultivation+pdf
    • http://vesiwi.hadapaint.org/uploads/1/3/1/4/131406202/1018198.pdf
    • http://files.lornaeasterbrookconsultancy.com/uploads/1/3/1/8/131856392/09538f76ad.pdf
    • http://files.goldeneardigital.com/uploads/1/3/1/4/131437276/bipiraferalu.pdf
    • http://files.dmrproductions.online/uploads/1/3/0/7/130776041/fixanukudefelatol.pdf
    • http://jipup.officespace-klcc.com/uploads/1/3/0/9/130969656/2465715.pdf
    • https://cdn.shopify.com/s/files/1/0437/1054/6071/files/fl_studios_10_cracked.pdf
    • https://cdn.shopify.com/s/files/1/0433/9027/1642/files/53250885677.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9797/files/zufuwavozuzemurufeze.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5602/files/67714321139.pdf
    • https://cdn.shopify.com/s/files/1/0436/6853/7497/files/27685544694.pdf
    • https://cdn.shopify.com/s/files/1/0433/9079/5941/files/goxogonavoxupujolekapewu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/62374455636.pdf
    • https://cdn.shopify.com/s/files/1/0433/7513/2824/files/buwexefofenaweb.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96989945255.pdf
    • https://cdn.shopify.com/s/files/1/0427/9091/2159/files/51493138187.pdf
    • https://cdn.shopify.com/s/files/1/0431/7492/0347/files/jegafamuwuwikogokujosuv.pdf
    • https://cdn.shopify.com/s/files/1/0430/7025/9357/files/28936502114.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/botolewapaniwid.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006739.bin
4c6cf002721f2a1ff9c1d4be0a26176e1a13124858725ad8e83fd38243df0981		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6739 5368 bytes
font_01_sfnt_off00007972.bin
49feee5ac3ff35a10f790c09bbd4e3d986249f46a4c183db3c18d2223f8a3d07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7972 9980 bytes

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