Malicious PDF — malware analysis report

Static analysis result for SHA-256 79cca8211b682236…

MALICIOUS

PDF

44.1 KB Created: 2020-08-06 12:47:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 159298e52321f852b4b632ee193e252f SHA-1: 4b9e1f2f6a79d2d05d2d8f46eb9c8d6ef0be3aae SHA-256: 79cca8211b682236eed09d303668b02852b515f157b9030e76d7348a1af3e15a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which are designed to appear as legitimate research resources but redirect to malicious infrastructure. The primary malicious URL identified is `https://ttraff.ru/pify?keyword=characteristics+of+research+design+pdf`, which is flagged as a known malicious redirector. The document's structure suggests an attempt to create a link farm for SEO manipulation or to distribute malware indirectly.

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=characteristics+of+research+design+pdf
    • http://files.mrgutierrez.net/uploads/1/3/0/7/130775831/gimupogojepo_peredu.pdf
    • http://files.awonderland.co.uk/uploads/1/3/0/8/130873807/tokilo_silusotire_lalel_bakefadatuvu.pdf
    • http://nobimif.cerysthomasford.com/uploads/1/3/1/0/131070356/fudesitovipuxeba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/0049/4237/files/90302340717.pdf
    • https://cdn.shopify.com/s/files/1/0437/3794/0117/files/ferimuka.pdf
    • https://cdn.shopify.com/s/files/1/0432/1699/4466/files/gokafolonap.pdf
    • https://cdn.shopify.com/s/files/1/0435/1049/7434/files/fezefutileveneja.pdf
    • https://cdn.shopify.com/s/files/1/0431/6954/6395/files/zalulotibifotan.pdf
    • https://cdn.shopify.com/s/files/1/0431/9064/8996/files/tavasor.pdf
    • https://cdn.shopify.com/s/files/1/0431/4831/2738/files/98410522027.pdf
    • https://cdn.shopify.com/s/files/1/0428/4448/7836/files/88124816815.pdf
    • https://cdn.shopify.com/s/files/1/0434/7196/2265/files/92227967509.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8853/files/natabegavevinajijadu.pdf
    • https://cdn.shopify.com/s/files/1/0447/0787/2921/files/diuretic_drugs_classification.pdf
    • https://cdn.shopify.com/s/files/1/0437/5940/3157/files/behavioral_treatment_for_adhd.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41732402988.pdf
    • https://www.cancer.gov/coronavirus
    • 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_off00006c6d.bin
d80eaa139ba3000791e842c3795a0749cb64429eb9920f2bcc5a52db734e6dce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C6D 5292 bytes
font_01_sfnt_off00007e62.bin
e70b773110cadc3e2a0b82f477fe6ff449fd07190a59ca404b214c1dbfb88f05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E62 10900 bytes

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