Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9328175f064032d…

MALICIOUS

PDF

43.8 KB Created: 2020-08-22 13:55:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c16d870cf25685c99bf19ff6a4c2530 SHA-1: be145b54c6c6ca31eadea6251eb7550a3504bb15 SHA-256: e9328175f064032d82683ab1b0bf1c65932037902d906ee8963a4519d3bb9b12
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One prominent link, 'https://ttraff.ru/pify?keyword=descargar+bloody+roar+2+para+android+gratis', is identified as a malicious redirector. The document body contains garbled text but also includes the same malicious URL and several benign-looking PDF URLs, indicating a lure to download content.

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=descargar+bloody+roar+2+para+android+gratis
    • http://peziriges.nicoladaviscrafts.co.uk/uploads/1/3/1/3/131383483/5103654.pdf
    • http://fofuvo.intoschool.org/uploads/1/3/1/4/131483281/nepemun.pdf
    • https://cdn.shopify.com/s/files/1/0440/9622/5432/files/bleacher_report_nfl_draft_top_400.pdf
    • https://cdn.shopify.com/s/files/1/0429/5848/7715/files/borderline_personality_disorder_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/4861/5579/files/52574602715.pdf
    • https://cdn.shopify.com/s/files/1/0430/7514/1794/files/sawodapupuzineliweza.pdf
    • https://cdn.shopify.com/s/files/1/0440/3675/1525/files/xakuwunase.pdf
    • https://cdn.shopify.com/s/files/1/0434/6042/7928/files/35257024120.pdf
    • https://cdn.shopify.com/s/files/1/0430/5187/6509/files/careless_whisper_trumpet.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/vejewupekekoxuvepa.pdf
    • https://cdn.shopify.com/s/files/1/0429/1208/8231/files/jejefulumivulilatog.pdf
    • https://cdn.shopify.com/s/files/1/0432/0316/6369/files/87855023934.pdf
    • https://cdn.shopify.com/s/files/1/0429/9119/0175/files/telugu_calendar_2020_download_andhra_pradesh.pdf
    • https://cdn.shopify.com/s/files/1/0434/6275/4461/files/sc_st_atrocities_act.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_off00005348.bin
4e89a8c30fbae034e759d2ebbc87745a67438a026e8657f09c5b5f03f7d96f2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5348 5612 bytes
font_01_sfnt_off0000666e.bin
2d818b0227d5b9b113b448b831051400246b88974e5a88da59332189ba59bc4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x666E 10012 bytes
font_02_sfnt_off000088f5.bin
f2a6d6186339a6759329df00840f0868f16075e8e8baa44166b54597afa7cfae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88F5 17164 bytes

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