Malicious PDF — malware analysis report

Static analysis result for SHA-256 f85e1ef36a098f47…

MALICIOUS

PDF

64.0 KB Created: 2020-08-14 01:59:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7fd14030746f376e3c7157119ce694c SHA-1: 6df3174eb4903eee8eef9b2741ea4ca8629e4f1a SHA-256: f85e1ef36a098f476893c7860e1090a8b18bb89483cd7d5520520b2c1a7dbe22
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service known to host malicious content. The document body, while heavily obfuscated, contains text related to 'sustainable development goals report 2018 pdf' and includes the malicious redirector URL, suggesting a lure to trick users into visiting potentially harmful sites. The ML classifier strongly flagged this PDF as malicious.

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=sustainable+development+goals+report+2018+pdf
    • http://files.sisterspiritwomensharingspirituality.org/uploads/1/3/2/6/132696112/jupepowigonag.pdf
    • http://files.thelastnightofmytwenties.com/uploads/1/3/1/0/131070374/fowidapixapo_gufozigime.pdf
    • http://files.ssls-eg.com/uploads/1/3/1/4/131453894/kezedadurib_jasinatopisaxes_gilabit_doduxit.pdf
    • http://files.trustonyu.com/uploads/1/3/1/4/131452778/sivaleserilis-xakib-nidofek-diwobipezavib.pdf
    • http://files.artappraisalfirm.com/uploads/1/3/1/6/131606687/8803384.pdf
    • https://cdn.shopify.com/s/files/1/0431/3032/3095/files/basic_electrical_engineering_notes_1st_sem_vtu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8030/3270/files/apprendre__lire_l_heure.pdf
    • https://cdn.shopify.com/s/files/1/0435/7731/1391/files/general_zoology_laboratory_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/4537/0518/files/kitupajedirusoxu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4417/5013/files/apprendre_python_3_franck_ebel.pdf
    • https://cdn.shopify.com/s/files/1/0436/0467/2675/files/kisader.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3468/files/ferenalewivawawagubekoz.pdf
    • https://cdn.shopify.com/s/files/1/0437/6464/6049/files/xogekab.pdf
    • https://cdn.shopify.com/s/files/1/0435/1016/9759/files/59877458411.pdf
    • https://cdn.shopify.com/s/files/1/0431/7757/4562/files/dosizumunijozipuzutazudi.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b9de.bin
e04eb63645b3128c7296ceee7fa60b87ac9a0676b2d447930f277238aa8aa6b1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB9DE 6184 bytes
font_01_sfnt_off0000cece.bin
7c3ba8e25d18cae59e92cef7ced5487f420ab875e8befbbe16f0e04b6854c655
pdf-font-stream PDF embedded font (sfnt) at offset 0xCECE 10568 bytes