Malicious PDF — malware analysis report

Static analysis result for SHA-256 03c14c2fbc01baff…

MALICIOUS

PDF

45.5 KB Created: 2020-08-13 23:33:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20cb6cd9358054786d8796455b1a9595 SHA-1: 7bb6210b5d831168e63d023d86c62568dc2ac4b7 SHA-256: 03c14c2fbc01baffcfad620d41c817101a72f63e20a6a69c03de82912668ee54
154 Risk Score

Malware Insights

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

The PDF contains embedded links that lead to a redirector, which is part of a link farm designed to distribute malicious content. The document body, though obfuscated, contains text related to a medical procedure, likely intended as a lure. The ML classifier strongly indicated maliciousness, and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the presence of malicious redirector infrastructure.

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=bone+marrow+biopsy+procedure+note+template
    • http://fevade.pathwaystohealng.com/uploads/1/3/0/9/130969679/polenidi_taxapokuxe.pdf
    • http://kebin.samchaseyoga.com/uploads/1/3/1/3/131398428/2679141.pdf
    • http://files.mycorporatecounselor.com/uploads/1/3/0/7/130775921/4052286.pdf
    • http://mupixi.durhamsai.com/uploads/1/3/1/4/131408100/xozunilomudurunabewu.pdf
    • http://nuvilu.anitasmithacupuncture.com/uploads/1/3/0/9/130969060/gupapukuvopajopijax.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0445/6975/5812/files/a._i._sha_my_virtual_girlfriend_full.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35031547028.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/physical_chemistry_levine_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/7105/9608/files/9983996099.pdf
    • https://cdn.shopify.com/s/files/1/0429/5789/7882/files/52239904778.pdf
    • https://cdn.shopify.com/s/files/1/0430/2585/8714/files/49277130652.pdf
    • https://cdn.shopify.com/s/files/1/0437/0015/8632/files/64306082505.pdf
    • https://cdn.shopify.com/s/files/1/0440/6339/1894/files/lc_oscillator_theory.pdf
    • https://cdn.shopify.com/s/files/1/0428/6241/1935/files/meketeluf.pdf
    • https://cdn.shopify.com/s/files/1/0431/6263/2360/files/update_act_ffxiv.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_off00007413.bin
2710f07f76f87ac9d5cc3ec7e540e32c822c94ddb379703ac6492cdec28b0d0d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7413 5600 bytes
font_01_sfnt_off00008706.bin
ebb779c0ceea91377a11bd27fa4be6cbd96cd038833b2ce94443b70fabf35b8e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8706 9980 bytes