Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e092e07dd98a244…

MALICIOUS

PDF

61.6 KB Created: 2020-08-12 02:57:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 106a208f7e716054e71b38b38d910316 SHA-1: b98c39f449830e3cf22122dfcae597e7a0f8c574 SHA-256: 2e092e07dd98a2440fda4b46d149f07698dae864f06215862a107c126415c2a4
128 Risk Score

Malware Insights

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

The PDF contains a lure for fake invoices or payments, as indicated by the 'SE_INVOICE_LURE' heuristic. It also features a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=bookkeeping+controls+workbook+pdf', which is a critical finding. The document body, though heavily obfuscated, contains the same malicious URL. The presence of numerous external PDF links, including one to a Shopify domain, suggests a link farm for SEO poisoning or distribution.

Heuristics 4

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=bookkeeping+controls+workbook+pdf
    • http://files.inthezonebar.com/uploads/1/3/0/7/130739340/8329762.pdf
    • http://files.whatthefoodfilm.com/uploads/1/3/2/8/132815866/3731003.pdf
    • http://files.perrysbarandgrille.com/uploads/1/3/0/7/130774964/lodowuwoleja.pdf
    • https://cdn.shopify.com/s/files/1/0431/1128/4893/files/13430238096.pdf
    • https://cdn.shopify.com/s/files/1/0432/2331/8683/files/aptis_reading_practice_test.pdf
    • https://cdn.shopify.com/s/files/1/0429/9902/1717/files/77694493224.pdf
    • https://cdn.shopify.com/s/files/1/0435/8481/5259/files/aiims_bsc_nursing_entrance_exam_previous_year_question_papers.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7904/files/92341998220.pdf
    • https://cdn.shopify.com/s/files/1/0430/2484/2906/files/94931971234.pdf
    • https://cdn.shopify.com/s/files/1/0437/2958/4293/files/bradford_pa_weather.pdf
    • https://cdn.shopify.com/s/files/1/0438/8959/0427/files/bronconeumonia_bovina.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/52469004977.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dadimutixiwukigojubiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/5792/9623/files/sakura_dungeon_luck_statue.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_off0000b315.bin
b367aa9f326f3d5d5da42941b703ebf180fded3d8713c606b8fa6650754d40ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB315 5456 bytes
font_01_sfnt_off0000c5c6.bin
de0a4a08921a537e57277ede65688c41c18dc21cccd3556d181346dd9031274a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5C6 10472 bytes

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