Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d01990af4f3fc04…

MALICIOUS

PDF

44.6 KB Created: 2020-08-06 17:09:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1893d73c50a27a07d19adf9329dc6269 SHA-1: 3d4303918dc3cccf12e87dc73f5135ddec3fb0c4 SHA-256: 4d01990af4f3fc04685d8d35d1da3c18aeec51be176f623a9b0c004eac75c672
152 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as a legitimate download for 'Nrc assam draft list 2020 pdf download'. The primary link, https://ttraff.cc/pify?keyword=nrc+assam+draft+list+2020+pdf+download, is identified as a malicious redirector. The document body, though heavily obfuscated, contains this lure text and the malicious URL. The ML classifier strongly indicates maliciousness.

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=nrc+assam+draft+list+2020+pdf+download
    • http://files.bellamcbride.ca/uploads/1/3/0/7/130775974/8062894.pdf
    • http://files.inspiredinksbymadeline.com/uploads/1/3/1/3/131379928/gijati.pdf
    • http://zexilov.beso.co.nz/uploads/1/3/2/7/132740541/piraledeju_miwurosizo_mijekife_dexedivuzokofib.pdf
    • http://files.eaststreetartsnh.org/uploads/1/3/0/7/130738970/f9758b0.pdf
    • https://cdn.shopify.com/s/files/1/0437/8745/2576/files/15353115402.pdf
    • https://cdn.shopify.com/s/files/1/0437/7251/0362/files/12218760689.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kovutuku.pdf
    • https://cdn.shopify.com/s/files/1/0433/0248/6180/files/sosujukojazelipon.pdf
    • https://cdn.shopify.com/s/files/1/0434/5335/0055/files/how_to_connect_matricom_controller_to_pc.pdf
    • https://cdn.shopify.com/s/files/1/0432/1171/8820/files/vuwejabovajamalejigegosad.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65545430121.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/xeduvaliletebidimufewa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4713/3088/files/alphabet_anglaise.pdf
    • https://cdn.shopify.com/s/files/1/0427/4742/9031/files/21640596843.pdf
    • https://cdn.shopify.com/s/files/1/0433/7562/4350/files/kowotidazigabupawepori.pdf
    • https://cdn.shopify.com/s/files/1/0431/1806/7866/files/64878264188.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7319/files/rotadabowakazadav.pdf
    • https://cdn.shopify.com/s/files/1/0430/3588/5721/files/gobixejamo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006403.bin
5e42ed257603703cf960adf6b69b1cbcd30fd5e8e6661c11f59608786d70a5fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6403 5636 bytes
font_01_sfnt_off0000772b.bin
19d579821e83c32cd478aefcb57f849508ece8625c42f2108810477b29a00d2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x772B 1936 bytes
font_02_sfnt_off00008071.bin
a57a9240add200f472d0a2eeb7ab651e803fe178bf157cea6d452275b5f52312		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8071 10624 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.