Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cd690198bc1a301…

MALICIOUS

PDF

43.8 KB Created: 2020-08-18 15:48:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78176b2ab1888706576c244b0f84b126 SHA-1: 60eb69698a9cbf06403e355de054adaa0b42df52 SHA-256: 4cd690198bc1a3018633a4f75ada7f33c14242d2e0a9bc93907cc5100e10176e
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to malicious infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be a lure for downloading Chromium OS. This URL redirects to 'ttraff.cc', a known malicious redirector. The PDF also contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or spamming technique.

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.cc/pify?keyword=chromium+os+x86+iso
    • http://files.morganmonroe.net/uploads/1/3/1/6/131606965/givirejelefe-jatepirugatal.pdf
    • http://wevojij.globalrelocationsolutionsinc.com/uploads/1/3/2/8/132814930/ruwipidona.pdf
    • http://files.theavancehotel.com/uploads/1/3/0/7/130738848/65ce9e493f.pdf
    • http://zabomuv.schgocbkp.org/uploads/1/3/1/3/131379373/f8373b4c78b838.pdf
    • http://files.rabbitmountainlavender.com/uploads/1/3/0/7/130738625/futevukumuj_lulamatix_libujuferebetux.pdf
    • https://cdn.shopify.com/s/files/1/0431/0794/2549/files/puropu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84574839703.pdf
    • https://cdn.shopify.com/s/files/1/0430/6229/6725/files/ketofipivob.pdf
    • https://cdn.shopify.com/s/files/1/0434/6583/4649/files/clubbers_guide_ibiza_2008.pdf
    • https://cdn.shopify.com/s/files/1/0441/3623/5160/files/desupo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5461/2123/files/81868714159.pdf
    • https://cdn.shopify.com/s/files/1/0434/0485/3402/files/simedapubomodo.pdf
    • https://cdn.shopify.com/s/files/1/0437/8230/7989/files/action_words_worksheets_for_kindergarten.pdf
    • https://cdn.shopify.com/s/files/1/0440/7525/3910/files/1152302114.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/5676577217.pdf
    • https://cdn.shopify.com/s/files/1/0454/1726/7368/files/a-_x-_l_full_movie_sub_indo.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_off00006ebf.bin
ebf36fd0d2f0e6cd60a2be4305b0ac818a64ddf7847c2a91870cf55c30fbf7cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBF 5004 bytes
font_01_sfnt_off00007fa6.bin
c11cd9c5eaa635b3d7658cc28cf7b026ba76f445d4d9add0e2d85f7d2b84b399		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA6 10084 bytes

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