Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1ac209f31bb6416…

MALICIOUS

PDF

39.8 KB Created: 2020-08-14 23:00:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73d40175d570f2f50509eddd0414af30 SHA-1: c73be50b63b267cc5350f90fa55f5505bd4773ab SHA-256: f1ac209f31bb6416ac083f88865526ae1ec0d1631ef691d24a1711e960b4e4e2
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, a technique often used for SEO poisoning or to direct users to malicious sites. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/wb?keyword=le%20bescherelle%20conjugaison%20pdf'. While many other links point to benign Shopify domains, the presence of the malicious redirector is a strong indicator of malicious intent. The document body, though heavily obfuscated, contains references to the redirector URL and other PDF links, suggesting a coordinated effort to drive traffic to malicious infrastructure.

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/wb?keyword=le%20bescherelle%20conjugaison%20pdf
    • http://sutib.seekhaven.org/uploads/1/3/1/6/131606938/fawufixodireloparupo.pdf
    • http://files.westvalleyfamiliesestrella.com/uploads/1/3/2/8/132815123/1892165.pdf
    • http://files.peterson-equipment.com/uploads/1/3/2/6/132682790/4bfbacaebb4d.pdf
    • http://tutimule.lhjhchoir.com/uploads/1/3/2/7/132740850/2505869.pdf
    • https://cdn.shopify.com/s/files/1/0433/6910/3528/files/43358598860.pdf
    • https://cdn.shopify.com/s/files/1/0449/8427/1016/files/84304415738.pdf
    • https://cdn.shopify.com/s/files/1/0435/0279/6964/files/catholic_symbols_and_meanings.pdf
    • https://cdn.shopify.com/s/files/1/0450/7769/2581/files/types_of_taxonomic_characters.pdf
    • https://cdn.shopify.com/s/files/1/0432/7633/7318/files/pokaxalatoworuporipizawu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4836/9319/files/saraze.pdf
    • https://cdn.shopify.com/s/files/1/0435/7311/7086/files/91505765947.pdf
    • https://cdn.shopify.com/s/files/1/0432/1751/8751/files/sumifivugipediri.pdf
    • https://cdn.shopify.com/s/files/1/0436/2030/3006/files/12092210711.pdf
    • https://cdn.shopify.com/s/files/1/0437/5127/6696/files/jusisaposokimerufobarupe.pdf
    • https://cdn.shopify.com/s/files/1/0434/0737/6534/files/e5_a4_a9_e6_b0_a3.pdf
    • https://cdn.shopify.com/s/files/1/0427/8845/4559/files/60563176910.pdf
    • https://cdn.shopify.com/s/files/1/0436/4494/4542/files/34053754617.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sarozasupevukofapunaxovu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2998/7489/files/electrical_systems_design_book.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_off00004ca6.bin
73d819124f1432096304a0bf34471ba6a4b52c957711900a9fe9abf0c0310a1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CA6 5376 bytes
font_01_sfnt_off00005ed4.bin
d35a9c1430f8123fe1089617db44ca730f7176a49b23bac492f4a1168efcc091		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED4 11124 bytes
font_02_sfnt_off00008400.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8400 4324 bytes

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