Malicious PDF — malware analysis report

Static analysis result for SHA-256 e55e8034e97e3741…

MALICIOUS

PDF

43.6 KB Created: 2020-08-12 12:07:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ec9ae7db4f2c8035b5a0ba7cf3fccc4 SHA-1: 7bf586009166664eac20144b74fc20a9a67fb1b1 SHA-256: e55e8034e97e3741554b19f56e33d86a59c7713963ccd7b1d5db03d8594f89d2
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to physics problems, suggesting a lure. The PDF also contains a mass external PDF link farm, with many links hosted on Shopify, but the primary malicious indicator is the ttraff.com redirector.

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.com/pify?keyword=exercicios+de+fisica+associa%25C3%25A7%25C3%25A3o+de+resistores+resolvidos+pdf
    • http://bozirele.needsofmany.org/uploads/1/3/1/3/131379894/peferisod-valolu-tuzixepe.pdf
    • http://files.muslimahcommunitygroup.com/uploads/1/3/2/6/132682685/sokapivomixuk_nurelaxatut.pdf
    • http://files.monicacarrollart.com/uploads/1/3/1/6/131606431/81755a9.pdf
    • http://files.lorrieboylen.ca/uploads/1/3/1/3/131382808/9b872d.pdf
    • https://cdn.shopify.com/s/files/1/0434/3480/3352/files/kapukonub.pdf
    • https://cdn.shopify.com/s/files/1/0433/1126/7990/files/71752890178.pdf
    • https://cdn.shopify.com/s/files/1/0430/6065/8333/files/61575812038.pdf
    • https://cdn.shopify.com/s/files/1/0431/4975/4519/files/synonyms_worksheet_3rd_grade.pdf
    • https://cdn.shopify.com/s/files/1/0450/2552/5918/files/appreciation_letters_samples.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/aprender_hablar_ingles_rapido.pdf
    • https://cdn.shopify.com/s/files/1/0427/9664/6556/files/43681655891.pdf
    • https://cdn.shopify.com/s/files/1/0438/4296/1570/files/encyclopedia_britannica_all_volumes.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/attestation_de_prise_en_charge_pour_visa_etudiant_france.pdf
    • https://cdn.shopify.com/s/files/1/0428/6165/8279/files/44941282681.pdf
    • https://cdn.shopify.com/s/files/1/0433/8899/3703/files/zefiweju.pdf
    • https://cdn.shopify.com/s/files/1/0433/8299/7148/files/7962308425.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_off000065da.bin
db14db3b07aebe9a7f676d48435125a2ecf92e600bc05e62184a9f37bf8f5d0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65DA 5736 bytes
font_01_sfnt_off0000789b.bin
f45915ca44fb502ffafe2b671b1059a6b12c9739043c44bda63b825af20af3db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x789B 12152 bytes

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