Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcd6177a91f50e51…

MALICIOUS

PDF

45.3 KB Created: 2020-08-22 02:03:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7519b2ad58edac83cd492990aa2faa6 SHA-1: e0f9ad6b54834d3e75d2a40bb3c83d1fd065e29f SHA-256: fcd6177a91f50e51406d1dd1496aa8ec11b80ee925302a4cd883b0d4e3ff6248
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, suggesting a link farm or redirection strategy. One critical heuristic identified a link to a known malicious redirector, and the ML classifier strongly indicated maliciousness. The document body, though partially corrupted, contains a title related to a lab answer, which is likely a lure to encourage users to click the embedded links.

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.cc/pify?keyword=soda+can+calorimetry+lab+answers
    • http://jibaki.napervillebedbugs.com/uploads/1/3/0/8/130815009/silexof-kofaro-riworaluguzas-benigagub.pdf
    • http://repupol.creativegeniuswithin.com/uploads/1/3/0/8/130874030/1345278.pdf
    • http://sabipela.hoosierbulldogrescue.com/uploads/1/3/0/7/130775732/4e7f3f84e.pdf
    • http://files.bathhousebasics.com/uploads/1/3/2/6/132695302/gowapomuvogilirejiga.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8890/files/navogomuzabonafol.pdf
    • https://cdn.shopify.com/s/files/1/0435/5820/7643/files/53161646864.pdf
    • https://cdn.shopify.com/s/files/1/0433/5022/9160/files/installation_reporting_services_2016.pdf
    • https://cdn.shopify.com/s/files/1/0430/4653/5322/files/fivivatate.pdf
    • https://cdn.shopify.com/s/files/1/0437/7051/1521/files/fevivekujodufiboxa.pdf
    • https://cdn.shopify.com/s/files/1/0440/7492/6230/files/catalogue_schneider_odace.pdf
    • https://cdn.shopify.com/s/files/1/0436/5457/8334/files/85768616302.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tapowizilefaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/5797/1362/files/nine_inch_nails_deep.pdf
    • https://cdn.shopify.com/s/files/1/0433/6268/0984/files/gowumaxogu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5338/2822/files/gender_reveal_sheet_cake_ideas.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_off000069a0.bin
060e4ae7f86c5407abcbfe902bdb376160d648e5edf85a0057a6d496abdb4f9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69A0 5524 bytes
font_01_sfnt_off00007c5c.bin
efbcc37b2b7ada964dd4768028a59eb95cec3057f3c5976ae31157446c923d09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C5C 14000 bytes

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