Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a59b18109b5c7b0…

MALICIOUS

PDF

34.2 KB Created: 2020-08-06 07:12:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f574613500be282591f1d02ff2fd5b8 SHA-1: 1e5003dd8af449255d33ea0131a516d1abd411c4 SHA-256: 2a59b18109b5c7b0bb1a6fa6dab7378f84fa711bfdd7b6cce20b8dd6986a236b
150 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and contains a high number of embedded links, many pointing to external PDF files. One critical heuristic identified a link to a known malicious redirector, ttraff.ru. The document body, though heavily obfuscated, contains references to the redirector URL and several Shopify-hosted PDF files, suggesting a link farm or SEO poisoning attack. No scripts were extracted, limiting the analysis of direct payload delivery.

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.ru/pify?keyword=alemlube+catalogue+pdf
    • http://sozarosep.ellatainment.com/uploads/1/3/0/7/130739693/3347582.pdf
    • http://files.classicwindowsandsiding.com/uploads/1/3/1/6/131636678/36f65d.pdf
    • http://files.fellowshipcommunitychurchok.org/uploads/1/3/0/9/130969148/rowadaje-lujixuj-revow-likejepewekasi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2526/7877/files/cma_part_1.pdf
    • https://cdn.shopify.com/s/files/1/0433/6910/3528/files/kaxifapizubilegupeguw.pdf
    • https://cdn.shopify.com/s/files/1/0435/9127/0563/files/diccionario_biblico_catolica.pdf
    • https://cdn.shopify.com/s/files/1/0438/2756/0610/files/nekezokolotikutibitize.pdf
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/wall_mount_pencil_sharpeners.pdf
    • https://cdn.shopify.com/s/files/1/0436/9963/4328/files/napidejovizegodup.pdf
    • https://cdn.shopify.com/s/files/1/0435/5263/7091/files/openssl_wildcard_certificate.pdf
    • https://cdn.shopify.com/s/files/1/0429/5763/5735/files/gagisemesarajumujevedegi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5054/0964/files/31216773590.pdf
    • https://cdn.shopify.com/s/files/1/0435/1423/3000/files/how_to_rearrange_page_order_in.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8056/files/lorubobi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8720/0418/files/legisaronivilapewatofo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0041/3856/files/28754930819.pdf
    • https://cdn.shopify.com/s/files/1/0430/8510/3255/files/gaduk.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_off000049bf.bin
cac5678de94137362c869bd279f6685a6c6f74eafb0d99cf9ec1ec56bc5fa0e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x49BF 5328 bytes
font_01_sfnt_off00005bcf.bin
1b14be176ff014620a09c78eee0053bbd9ee9dcef97590d9699e32c80e33716b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BCF 9528 bytes