Malicious PDF — malware analysis report

Static analysis result for SHA-256 049f88bbfcf02949…

MALICIOUS

PDF

66.1 KB Created: 2020-10-23 15:25:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7c476d6fa4acc9457f73496723b755e2 SHA-1: 926a7e4c168d51be27ba874c11eee2f127e7df51 SHA-256: 049f88bbfcf0294973a91d2490e34f3bb9ce04559ac7a1fd45daa88b67ee12ac
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a significant heuristic firing indicating it's a link farm designed to redirect users. One of the primary redirector URLs, https://cctraff.ru/strik?keyword=shadowcraft+mage+3.5, is flagged as malicious. While no scripts were directly extracted, the PDF structure and the presence of embedded URLs suggest an attempt to direct users to malicious content, likely as part of a phishing or redirection scheme.

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=shadowcraft+mage+3.5 In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca874637-125f-448a-995d-d808b2cac36e/lexus_es_350_owners_manual_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b00ad34d-06ec-491a-b19d-43bd69d79488/kafepijoluxizar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0e2186b-d3db-4213-8086-a63fe4c397a6/ripoxoxosanetagit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8592984f-aa65-4866-a9c9-0c07f81d3402/55197218888.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6f57311-efd0-4ef1-b0e8-e9c69449421b/grinding_machine_project_report.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/kejetoduzexinuxotoletiwoz.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/basic_computer_knowledge_ms_office.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/96030461040.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/sewesugipavafob.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/70323184794.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/agrippa_three_books_of_occult_philosophy.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/gipesonefipaxelat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0136/3619/files/26623290142.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3318/8762/files/roka_charlotte_street_menu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/0070/1343/files/88340380707.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0456/7450/files/how_to_cite_florida_nurse_practice_act_in_apa_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8114/5762/files/janome_744d_overlocker_instruction_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b5c5e79-8ac0-474e-ae18-859ab4f43e3a/72725094926.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db4ad8fb-a4f2-4df2-b4a9-331930405656/digital_electronics_bangla_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec663cce-63dc-4c5f-ad9b-6d5be836e879/diralosok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/231aa7d6-3857-4744-9467-ffacbbd77a36/rawazufesapad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffe5771a-83a3-42ce-b5b3-290e6e45e25d/fobure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a8b0f60-eb2f-4992-a0c7-4a82ab535a42/57230503104.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000c6b3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xC6B3 29872 bytes
SHA-256: 2ba754b3a483034c0ce0ba1ec51bdf2aedd4ea7f1a7f4997986d1840a30befdf
font_00_sfnt_off00008e34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E34 5740 bytes
SHA-256: bb61e3680e6fbbb8364759eb359a9dab724b515222265aab7a59393584b99896
font_01_sfnt_off0000a1b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1B0 10744 bytes
SHA-256: e2859d27fd4cffe3cf2303002c943fa34e6c30f553a3e6fd2d93b438e8f8cafc