Malicious PDF — malware analysis report

Static analysis result for SHA-256 704022a7195f2f39…

MALICIOUS

PDF

41.5 KB Created: 2020-08-13 01:32:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ba30050da4afeb0e0ef16a13c93f21d SHA-1: 4555c3522c74a894f467bf53f786774cf2bb7734 SHA-256: 704022a7195f2f3921988d6344c3f168620ca5aa6dc9f9ab19fb608b1a340301
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many of which point to a redirector service known for malicious activity. The document body and embedded links suggest an attempt to drive traffic to SEO-optimized content, likely as a lure for further malicious activity. No scripts were extracted, but the presence of a malicious redirector link is a strong indicator of malicious intent.

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.cc/pify?keyword=brassage+g%25C3%25A9n%25C3%25A9tique+au+cours+de+la+reproduction+sexu%25C3%25A9e+pdf
    • http://files.benjamin-lhotellier.com/uploads/1/3/1/3/131380850/zifakunikanova.pdf
    • http://files.nchomeremodel.com/uploads/1/3/0/8/130874042/togijigeboxupev_sobuzo_tirinebeja_mazawe.pdf
    • http://files.thewellwithinus.com/uploads/1/3/0/7/130738720/1273295.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6730/2303/files/agency_theory_in_corporate_finance.pdf
    • https://cdn.shopify.com/s/files/1/0441/2289/8584/files/xanuwozuzed.pdf
    • https://cdn.shopify.com/s/files/1/0435/8628/9832/files/32505062604.pdf
    • https://cdn.shopify.com/s/files/1/0447/7688/2327/files/boolean_algebra_calculator_project.pdf
    • https://cdn.shopify.com/s/files/1/0428/7424/1187/files/wunavelewetusavexo.pdf
    • https://cdn.shopify.com/s/files/1/0448/1158/3645/files/gta_san_andreas_cheats_file_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/7622/2114/files/golumogavatizufuzifepu.pdf
    • https://cdn.shopify.com/s/files/1/0441/3833/2312/files/lajijuru.pdf
    • https://cdn.shopify.com/s/files/1/0432/3098/6400/files/aurelio_s_pizza_menu.pdf
    • https://cdn.shopify.com/s/files/1/0435/7029/9048/files/keto_diet_menu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5032/0543/files/a_horse_with_no_name_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0433/2742/2632/files/wilulofajakudizomoworiwa.pdf
    • https://cdn.shopify.com/s/files/1/0431/2901/2381/files/28969823742.pdf
    • https://cdn.shopify.com/s/files/1/0447/3965/7879/files/mechanism_of_labour_in_breech_presentation.pdf
    • https://cdn.shopify.com/s/files/1/0438/2847/8102/files/schedule_6_balance_sheet_format.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_off0000604d.bin
4ec4b26d6a066e8fafe985ebc6af82dfc288f0ebe5b096c705a9b64516e0e35f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x604D 5708 bytes
font_01_sfnt_off00007376.bin
840446d2b18429f29565f0e203116e1dc0889e6d815f968ae33f8dca45b75d6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7376 10696 bytes

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