Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c047baa97e0bb27…

MALICIOUS

PDF

53.4 KB Created: 2020-10-04 15:43:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fdbe1ee4979ea23bd9f97b02417d7569 SHA-1: 3dbc300498c59216368d96e537e3a9dad58647ce SHA-256: 0c047baa97e0bb277e1dc1ed429a2ca923853b87157742502b8578fb3d424a9c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external resources, suggesting a link farm or SEO poisoning attempt. One prominent link directs to a known malicious redirector, indicating an attempt to lead the user to a harmful site. The document body, though heavily obfuscated, contains the same URL as the malicious redirector, reinforcing the 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://cctraff.ru/strik?keyword=how+do+biotic+and+abiotic+factors+interact+with+each+other In PDF document text
    • http://files.fhcamd.org/uploads/1/3/1/6/131637034/5932877.pdfIn PDF document text
    • http://files.representjesus.com/uploads/1/3/1/1/131163747/4165406.pdfIn PDF document text
    • http://files.uclappa.com/uploads/1/3/2/8/132815748/5e500.pdfIn PDF document text
    • https://site-1043397.mozfiles.com/files/1043397/bunafujadexelojepel.pdfIn PDF document text
    • https://site-1036646.mozfiles.com/files/1036646/37415161247.pdfIn PDF document text
    • https://site-1039671.mozfiles.com/files/1039671/53302789825.pdfIn PDF document text
    • https://site-1038924.mozfiles.com/files/1038924/vuzobaref.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3534/8128/files/zoo_tycoon_2_animal_downloads_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5598/6341/files/90797614625.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/3008/6297/files/ark_gacha_claus_ragnarok_location.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6726/0576/files/air_canada_jazz_carry_on_baggage_allowance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/5553/7064/files/in_dash_navigation_dvd_player.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6997/5965/files/61210613608.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000084c1.bin
ea3e4ba1a296dda73869de9facda4b4244d0ddf84ea2bd1724db7c24e50914af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84C1 5056 bytes
font_01_sfnt_off000095f4.bin
63cd9a5cc09c7df647ebf9eafab5f7bf1cf57b903278a055d4676133595c9ef1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95F4 10964 bytes
font_02_sfnt_off0000ba44.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA44 4324 bytes

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