Malicious PDF — malware analysis report

Static analysis result for SHA-256 d21340552b823800…

MALICIOUS

PDF

53.7 KB Created: 2020-08-22 21:26:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff67d939ccd3de06821d22b60cdd80d7 SHA-1: a03fd1b8efee96f11acf7ce04c55d84df5602cb8 SHA-256: d21340552b823800b5f483e55944d6cf308250802f6dd289150d32713495932d
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, which is indicative of a link farm. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=android+constraintlayout+bias+not+working'. The document body, though heavily obfuscated, contains this same URL, suggesting the primary intent is to redirect the user to malicious infrastructure. No scripts were extracted from this sample.

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=android+constraintlayout+bias+not+working
    • http://files.worldsandgames.org/uploads/1/3/2/8/132816106/lemek.pdf
    • https://cdn.shopify.com/s/files/1/0431/6731/8167/files/68755393828.pdf
    • https://cdn.shopify.com/s/files/1/0434/0577/0909/files/ornament_background_vector_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/7514/1783/files/centrifugation_equipment.pdf
    • https://cdn.shopify.com/s/files/1/0435/6472/8483/files/advertisement_format_in_english_grammar.pdf
    • https://cdn.shopify.com/s/files/1/0429/9050/2042/files/new_idea_5209_discbine_parts_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0429/6045/3785/files/agriculture_durable_au_maroc.pdf
    • https://cdn.shopify.com/s/files/1/0431/3533/6605/files/kufajimovokesamobudibebi.pdf
    • https://cdn.shopify.com/s/files/1/0428/3170/8316/files/95185519669.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5208/files/98830454959.pdf
    • https://cdn.shopify.com/s/files/1/0433/6241/8847/files/portal_gun_terraria.pdf
    • https://cdn.shopify.com/s/files/1/0431/3278/0695/files/psychosis_creepypasta.pdf
    • https://cdn.shopify.com/s/files/1/0434/7609/1046/files/36658468247.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_off00007a25.bin
1ead3b315a958d4d0e2aef01ef60b48b6af70483a5e5912785e60d8c9429aca7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A25 5256 bytes
font_01_sfnt_off00008c1c.bin
53d2b063975b25fcac1a304b9ce5c613cffa6128302e6fca2c7747e5d9ac355f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C1C 15264 bytes
font_02_sfnt_off0000bbcb.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBCB 4324 bytes

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