Malicious PDF — malware analysis report

Static analysis result for SHA-256 11fc8090a55368c2…

MALICIOUS

PDF

47.9 KB Created: 2020-08-12 14:12:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9cb7cfb2f930c05f5a27765877ac9a2c SHA-1: e42945f4488bacb5321bd863677494209789f13d SHA-256: 11fc8090a55368c25f58c002a134251162eb19a41a1aa975069b894cc6151fdd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link that redirects to a malicious domain, likely as part of a phishing or scam campaign. The document body and embedded link structure suggest an attempt to trick users into downloading content from a link farm, which ultimately leads to malicious infrastructure. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=yayati+novel+pdf+in+marathi
    • http://lazobifi.sandraharveyphotography.com/uploads/1/3/0/8/130813030/04bf1a4.pdf
    • http://files.michelprincebooks.com/uploads/1/3/1/6/131606630/18edbbea4.pdf
    • http://files.pistem.org/uploads/1/3/0/8/130874522/tovosodutexezavuje.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0429/8987/9445/files/dadilulopibisafoxid.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/small_review_safe.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/50532019620.pdf
    • https://cdn.shopify.com/s/files/1/0432/7391/2488/files/75555842489.pdf
    • https://cdn.shopify.com/s/files/1/0431/0024/2077/files/lolezegajalajajosasefus.pdf
    • https://cdn.shopify.com/s/files/1/0436/6611/2662/files/14851217655.pdf
    • https://cdn.shopify.com/s/files/1/0431/0230/6468/files/amplificateur_oprationnel_soustracteur.pdf
    • https://cdn.shopify.com/s/files/1/0429/6127/2983/files/karofatupewod.pdf
    • https://cdn.shopify.com/s/files/1/0434/0921/1549/files/class_of_3000_backgrounds.pdf
    • https://cdn.shopify.com/s/files/1/0448/5762/2689/files/codigo_brasileiro_da_aeronautica.pdf
    • https://cdn.shopify.com/s/files/1/0432/0342/8515/files/calendario_mensual_2020_para_imprimir.pdf
    • https://cdn.shopify.com/s/files/1/0430/4932/0597/files/baltasar_and_blimunda.pdf
    • https://cdn.shopify.com/s/files/1/0427/4028/5607/files/dakiduvusekokadilelanux.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e0a.bin
4e5197fd7ad78ed75b79e416e2f02077670ffb30a8d402bd08e9f19ee931afe5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E0A 5228 bytes
font_01_sfnt_off00007fb2.bin
61c1a27df8aef4d2c8e8b8f65a45759a29c516e7341108afb5d8815877f685da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB2 12708 bytes
font_02_sfnt_off0000a7f1.bin
0f2807cdc8cd2f084c7badf1cac5e9d7f4a9fcf56d5ba2467ee756378563b482		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7F1 2592 bytes

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