Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5604926df829281…

MALICIOUS

PDF

42.1 KB Created: 2020-08-12 11:14:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69fa8ee03d475846c50cd7ab02eb2620 SHA-1: d11a30d3fcaada090325005f80a1efc65e0ec968 SHA-256: b5604926df829281c0b0f8e6f54c4dd865970135bf88f46fa0ee8ac63df4ecab
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, indicating a link farm designed to redirect users to malicious content. One of the primary links points to a known malicious redirector, ttraff.ru, which is likely used to distribute further payloads. The document body is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf.

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.ru/pify?keyword=cospaces+tutorial+pdf
    • http://jixog.cowboyarmory.com/uploads/1/3/1/0/131070374/6197570.pdf
    • http://files.kerenzaltz.com/uploads/1/3/1/4/131482823/tipogonafu.pdf
    • http://lodatumim.shahinrabbani.ca/uploads/1/3/1/4/131454065/gesurugalanolimog.pdf
    • http://files.cultivatinginnovation.org/uploads/1/3/1/3/131398076/beec7f968459b.pdf
    • http://files.1000cancerstories.com/uploads/1/3/1/6/131636930/juzazaja_pekok_tidifadagubozo_wavot.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/49572552493.pdf
    • https://cdn.shopify.com/s/files/1/0438/0445/9168/files/zanavokolebu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8394/7414/files/lipigoxenelur.pdf
    • https://cdn.shopify.com/s/files/1/0434/1478/2104/files/47895103318.pdf
    • https://cdn.shopify.com/s/files/1/0435/1708/3802/files/retomobux.pdf
    • https://cdn.shopify.com/s/files/1/0430/3205/1873/files/zojebogenuvagivareruv.pdf
    • https://cdn.shopify.com/s/files/1/0429/2496/6044/files/vitamin_b12_metabolism.pdf
    • https://cdn.shopify.com/s/files/1/0432/1063/7476/files/velawajulutafejexiduri.pdf
    • https://cdn.shopify.com/s/files/1/0449/8876/0232/files/sbi_credit_card_benefits.pdf
    • https://cdn.shopify.com/s/files/1/0437/7896/5656/files/pizoxoligomudef.pdf
    • https://cdn.shopify.com/s/files/1/0432/8164/5736/files/mappa_turistica_bolzano.pdf
    • https://cdn.shopify.com/s/files/1/0434/5544/7202/files/downloadable_printable_calligraphy_practice_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0430/0357/6481/files/candleberry_books.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050f0.bin
ca46f38b44377d9f51f51253c565e380c8238a2e0d6c6bf7c5a92d88848f0040
pdf-font-stream PDF embedded font (sfnt) at offset 0x50F0 5052 bytes
font_01_sfnt_off0000622f.bin
98e8ce14bba32419b8dd4e7988701fcdaed596716de073fd4ab943b2b826b43a
pdf-font-stream PDF embedded font (sfnt) at offset 0x622F 10456 bytes
font_02_sfnt_off000085e1.bin
7e7eafd61a53baf48cfc5a263168edaf1d76203229712a4279bd46d8698463db
pdf-font-stream PDF embedded font (sfnt) at offset 0x85E1 16196 bytes