Malicious PDF — malware analysis report

Static analysis result for SHA-256 11521f784a8b5a82…

MALICIOUS

PDF

43.9 KB Created: 2020-08-28 03:55:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d868a6f528f20d0ddd031fa79999e6bb SHA-1: 2883aa1761c3e2c8cfc929f070dc5d7a872656b1 SHA-256: 11521f784a8b5a8289c709a6f9d8ab1238808186a3ce0653c415e3624c0e943e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.ru/pify?keyword=korelasyon+analizi+nas%25C4%25B1l+yap%25C4%25B1l%25C4%25B1r+spss, which is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to malicious 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=korelasyon+analizi+nas%25C4%25B1l+yap%25C4%25B1l%25C4%25B1r+spss
    • http://files.lutoncentralmosque.org/uploads/1/3/1/4/131454109/6908927.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/fogedakiniwaboxufapinomaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/6600/7445/files/adversus_haereses_san_ireneo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8488/1824/files/lobobime.pdf
    • https://cdn.shopify.com/s/files/1/0440/8714/8709/files/check_android_sdk_version_linux.pdf
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/pdf_editor_app_android.pdf
    • https://cdn.shopify.com/s/files/1/0436/0667/1517/files/61432004922.pdf
    • https://cdn.shopify.com/s/files/1/0430/0472/3349/files/hip_labral_tear_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0428/9150/9919/files/runemobodasav.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/odometer_disclosure_form_washington_state.pdf
    • https://cdn.shopify.com/s/files/1/0429/8617/6675/files/64382013937.pdf
    • https://cdn.shopify.com/s/files/1/0429/8804/4447/files/60338199662.pdf
    • https://cdn.shopify.com/s/files/1/0428/8937/9996/files/kolinafuketedodugawuredaw.pdf
    • https://cdn.shopify.com/s/files/1/0429/7503/5541/files/nuvapip.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006917.bin
e9e4f8ff36787348ef3948b3bdd08fcd68d1acc2102a09455e94eaa9e2d76561
pdf-font-stream PDF embedded font (sfnt) at offset 0x6917 4968 bytes
font_01_sfnt_off00007a20.bin
704291cb0850a4903094ed45cb4f815d6170a23bda62b5bbe1819c0351d690f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A20 12344 bytes