Malicious PDF — malware analysis report

Static analysis result for SHA-256 22e60ea0d376058b…

MALICIOUS

PDF

45.1 KB Created: 2020-10-03 15:48:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: df6ac5a5fe579ff71f8325f0811cf658 SHA-1: 701fa9b4254227df7054bb5a2edb50f2e2bcf8db SHA-256: 22e60ea0d376058bf7413c58f4f7f80286cfab5dca9e019a983c65ba47ac73c5
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL https://ggtraff.ru/strik?keyword=top+pdf+reader+linux, which is flagged as malicious. This suggests the document is designed to trick users into clicking the link, likely leading to a phishing or malware download site.

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/strik?keyword=top+pdf+reader+linux In PDF document text
    • http://tuzonol.regalpropertymgmt.com/uploads/1/3/2/8/132814261/46b692b18.pdfIn PDF document text
    • http://fanitoni.roastedcoffeeqc.com/uploads/1/3/0/7/130776257/bujixomokuro.pdfIn PDF document text
    • http://files.placentapraha.com/uploads/1/3/2/6/132695915/joguzezepav.pdfIn PDF document text
    • http://ravavoj.violetpe.com/uploads/1/3/1/4/131437308/mumemesoku.pdfIn PDF document text
    • http://files.thechipmack.com/uploads/1/3/1/8/131856271/f25edbee722c4.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/1/0479/0216/3110/files/bdo_mystic_succession_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/5545/1812/files/27847842731.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6626/1141/files/10-1_cell_growth_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/521ec9ec-adb2-48f1-8486-e3766491dea1/72160042492.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1044/9820/files/conard_high_school_graduation_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6131/2664/files/33392002781.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5464/7446/files/sixokirevibokifezepelop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8691/2415/files/animal_farm_chapter_2_answers.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_off0000664b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x664B 4676 bytes
SHA-256: b1ee1f791e61207e7b99ee39feb3a083998a17cedcbf1f660ed6dc4337ff89a2
font_01_sfnt_off00007636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7636 10484 bytes
SHA-256: b59d58c62563376995b39dcb63600a5783d2ec8ae06422d7d52017c7df35ec3f
font_02_sfnt_off00009a05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A05 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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