Malicious PDF — malware analysis report

Static analysis result for SHA-256 000a84ace24b0857…

MALICIOUS

PDF

54.3 KB Created: 2020-08-24 06:31:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b87c4eeae9b97b7ef34367cdd468f3cc SHA-1: 369fcfd91cd81a0e636bdce03853c1f3c1dd37b4 SHA-256: 000a84ace24b08576bb36dd4958fbba994ac51c7f993e4cdf227b0d234efa759
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to `https://ttraff.ru/pify?keyword=canela+de+velho+extrato+seco+pdf`, which is known malicious infrastructure. This suggests the document is designed to lure users into clicking malicious links, likely for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

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=canela+de+velho+extrato+seco+pdf
    • http://files.theschoolofmakingthinking.com/uploads/1/3/0/9/130969334/3702415.pdf
    • http://files.sfcnewhire.com/uploads/1/3/1/3/131380482/fikux_wuwit_mobulida_fowad.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/7349/4430/files/67382811197.pdf
    • https://cdn.shopify.com/s/files/1/0436/4291/2926/files/uttar_kand_ramayan_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/8738/1155/files/jaridilezi.pdf
    • https://cdn.shopify.com/s/files/1/0437/0805/5720/files/liquid_diffusion_coefficient_lab_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/vepegubegufegiti.pdf
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/lunumasogimamiminajifaje.pdf
    • https://cdn.shopify.com/s/files/1/0431/6017/4754/files/30209347723.pdf
    • https://cdn.shopify.com/s/files/1/0448/4133/6989/files/exercices_sur_l_etat_de_rapprochement_bancaire.pdf
    • https://cdn.shopify.com/s/files/1/0430/9978/3319/files/rodore.pdf
    • https://cdn.shopify.com/s/files/1/0436/4523/9456/files/academic_book_review_example.pdf
    • https://cdn.shopify.com/s/files/1/0437/5206/3125/files/blade_runner_putlocker.pdf
    • https://cdn.shopify.com/s/files/1/0453/6195/4971/files/sindrome_ataxia_telangiectasia.pdf
    • https://cdn.shopify.com/s/files/1/0432/7899/1520/files/91169072627.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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000afd5.bin
bc3fe54e2f1dee6e00dc8f9d75187726d9e3ba1b91bc05be3a566acbe28c6ec3		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xAFD5 17788 bytes
font_00_sfnt_off0000766d.bin
2060d74049c7ac538cf60f81b7d7a9101c9ec53043284531076e2fd70229d1bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x766D 5276 bytes
font_01_sfnt_off00008863.bin
2cb6174c29a1c56ee1c7cc947c090b4fc56ac83754fa8d4b6fdc8fb3ddad60a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8863 13200 bytes

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