Malicious PDF — malware analysis report

Static analysis result for SHA-256 622c50842e9266ad…

MALICIOUS

PDF

53.6 KB Created: 2020-08-23 02:42:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4fb59a383d32d49746ff1147a219bc9 SHA-1: b1ff766834b55457184ce4f23d4d61e8253effc8 SHA-256: 622c50842e9266ad069e9432375f78f675d06679ffc6a9c4256b71816dbd9b3f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, many pointing to Shopify-hosted PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to known malicious redirector infrastructure, indicating a potential phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=barabbas+movie+free++2013 In PDF document text
    • http://ketoze.coolcayenne.com/uploads/1/3/1/1/131164250/bizokiko_dibuxudabun_gogigaxolevuv.pdfIn PDF document text
    • http://files.stacyboatman.com/uploads/1/3/2/6/132695336/vapirewumeg_muwosilepowolak_nitavemovefukax.pdfIn PDF document text
    • http://files.crosswaylacrosse.org/uploads/1/3/2/7/132710797/3404759.pdfIn PDF document text
    • http://files.rcoathletics.com/uploads/1/3/0/7/130775922/vamudaxopoju-xamiwar-pelukixuvapiz.pdfIn PDF document text
    • http://wupejire.running2keepup.net/uploads/1/3/1/0/131070718/sexigidufika.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6173/1743/files/zuwasanapaletumetij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6704/0154/files/9976458069.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1947/6896/files/around_the_world_in_80_days_play.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1470/6584/files/android_studio_kotlin_plugin_error.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1336/4121/files/tipos_antagonismo_farmacologico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2969/2577/files/45573581057.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/odisha_b._ed_question_paper_2020_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6271/4773/files/zovazixomodagipibipodu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5293/3019/files/2163722958.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2105/7700/files/1678142183.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4248/6944/files/setup_android_sdk_on_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8017/9109/files/airlink_747_map.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000083e4.bin
337416c998ec7c225366ea882804e7e84b688cec14eba98733f346dad1a6319b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83E4 5220 bytes
font_01_sfnt_off000095aa.bin
42af80332d9a07e364417463d31d73b1e655b75f35bb360736ec9d03bc08f662		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95AA 11180 bytes
font_02_sfnt_off0000bb0e.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB0E 4324 bytes

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