Malicious PDF — malware analysis report

Static analysis result for SHA-256 b311e419ae824b17…

MALICIOUS

PDF

51.2 KB Created: 2020-10-15 10:49:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 8fe060daa3289577ee6ea59258cdc698 SHA-1: 9591e06371b286c0dbc05d012c0e93b1657e58c8 SHA-256: b311e419ae824b177f60db15cbb5f92d766cf1d3cfedc86fc575eab3181b6584
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, characteristic of a link farm designed to manipulate search engine rankings or distribute traffic. One of the embedded URLs, https://ggtraff.ru/123?keyword=lightning+returns+ultimate+lair+guide, is flagged as malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lure users to malicious sites, likely as part of a phishing or spam campaign.

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://ggtraff.ru/123?keyword=lightning+returns+ultimate+lair+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366993/normal_5f87e9b87fb08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366653/normal_5f8742cd56b93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366302/normal_5f877a9d09de5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8526/1717/files/death_on_two_legs_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/7800/3109/files/to_too_two_worksheet_high_school.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4714/7925/files/2_nephi_31_19-20.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6180/4693/files/zikinuwanetagizomapasij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8271e470-fd54-4b8a-a4d9-855644a8e426/83224976749.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3adb2088-4387-4726-8587-0bce8c02b414/1420963851.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ccc1f1f-dc7a-459d-baab-9287ce82e371/77543888490.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b45ef5ea-67f3-4eba-a551-357d3f14f8f3/wofirizosozewokotusimi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27b871ed-e223-4fbc-a6ef-6cc2d5af6f50/66924895226.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/1163/3062/files/band_in_a_box_manuale_italiano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1144/0291/files/nina_and_pinta_schedule_2016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2116/8540/files/52592877767.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0156/3304/files/90721788140.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/2384/2718/files/95528989066.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9443/4202/files/47736430246.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/4996/7527/files/nba_jam_latest_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09348995-74d3-40ae-b6b0-491f67e246d0/kimopuko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09a7f5c2-3976-4698-a092-5d88bc7d4b71/53892783606.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8adfcbf2-885c-4d08-a268-28c3791c2e7a/zujokinuvifuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33500c7f-bbeb-4b01-a113-58977e4f12f2/62306528657.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_off000078b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78B8 4108 bytes
SHA-256: 6e8629763fdea8d99e06b145a610291308391ca0382adb9a3aa3aab9c65db3b7
font_01_sfnt_off0000873c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x873C 5180 bytes
SHA-256: 6e97f520797bfb234ceb8b7a64d47544b9a2905411a7e94e8db14e4cf7654e23
font_02_sfnt_off000098ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98AE 10684 bytes
SHA-256: 6e0fc55d585de6d8f78aed78771f8adb78520a641dc55206ef74d23e32640fd0