Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcbb73c19c46e2b0…

MALICIOUS

PDF

41.3 KB Created: 2020-08-02 11:30:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cdc740f3729bc4efea081da53f14eed7 SHA-1: 81dce9609b01aaab61ca1673c7358628660da3ff SHA-256: fcbb73c19c46e2b05cbef148988fe0455c10691685ffd04557d3fbd5264f6e2d
152 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=northwest+territory+tent+website, which is likely the primary malicious payload delivery mechanism. The file also contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of SEO link farm abuse for traffic redirection.

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=northwest+territory+tent+website
    • http://files.trailsclubofrossmoor.com/uploads/1/3/0/9/130969386/mubola-bizexeke-bojoro-mifun.pdf
    • http://files.chwksardiskiwanis.org/uploads/1/3/1/4/131454345/wigepoxenixufuv_tonizugetun.pdf
    • http://files.aingerband.org/uploads/1/3/0/7/130776326/cf3226a.pdf
    • https://cdn.shopify.com/s/files/1/0436/8865/7049/files/94365117766.pdf
    • https://cdn.shopify.com/s/files/1/0432/6365/6099/files/soundcraft_si_expression_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/8524/1245/files/figufemefelokamazovakal.pdf
    • https://cdn.shopify.com/s/files/1/0427/7259/4844/files/6556512642.pdf
    • https://cdn.shopify.com/s/files/1/0440/0722/7542/files/16064306411.pdf
    • https://cdn.shopify.com/s/files/1/0435/9028/7517/files/gozelasuzunewelejun.pdf
    • https://cdn.shopify.com/s/files/1/0429/6795/7658/files/tavixawejipenawupasedawaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/1567/5815/files/8660263790.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/11783771814.pdf
    • https://cdn.shopify.com/s/files/1/0433/7981/8661/files/48454462336.pdf
    • https://cdn.shopify.com/s/files/1/0432/3724/5085/files/79196046093.pdf
    • https://cdn.shopify.com/s/files/1/0435/8144/0168/files/pesusoliwuzalerugiso.pdf
    • https://cdn.shopify.com/s/files/1/0436/1804/2018/files/nekolusirel.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_off00006429.bin
3adc84455454ee703b26b004fd611738962bcafcf8771276daabc78bc71152b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6429 4836 bytes
font_01_sfnt_off000074b3.bin
f566fa5e66074089f57afeb8c472168e4699481000ec8b3ee815ddba1b59a6e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74B3 10604 bytes

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