Malicious PDF — malware analysis report

Static analysis result for SHA-256 2baeb0f73c87f480…

MALICIOUS

PDF

46.7 KB Created: 2020-10-15 20:48:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f574fca9292559524937a3a5d649468b SHA-1: 678080de24f831f9916a496fc6119462623646a1 SHA-256: 2baeb0f73c87f480aca4ab8fd49d83ce4fab542966a575be73703b80fa7bbef3
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify and Weebly domains, suggesting a link farm designed for SEO manipulation. One prominent link, 'https://cctraff.ru/strik?keyword=ketogenic+cookbook+pdf+free', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL, indicating an attempt to lure users to malicious infrastructure.

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=ketogenic+cookbook+pdf+free In PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/9232432.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/7360136.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/delelides_dasexurekiwar_jajumab.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/17563d38f77.pdfIn PDF document text
    • https://site-1039174.mozfiles.com/files/1039174/taxofunasivimu.pdfIn PDF document text
    • https://site-1043352.mozfiles.com/files/1043352/32017269985.pdfIn PDF document text
    • https://site-1040350.mozfiles.com/files/1040350/naxepub.pdfIn PDF document text
    • https://site-1036955.mozfiles.com/files/1036955/40419885218.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/1/0497/9671/0561/files/91214547990.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7872/5021/files/zeroketuwozu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7121/2193/files/swtor_companion_customization_vendor_locations.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8283/2790/files/24287690993.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9376/1956/files/tiny_troopers_2_apk_old_version.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/lejuralekogetagamivim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9127/1061/files/free_sports_tv_app_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0580/4195/files/sweet_onion_chicken_teriyaki_recipe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5744/6041/files/riwokasuzofawobovunowa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9583/4280/files/att_puerto_rico_planes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02e8d515-fb93-411c-bb79-abb15fdb44e8/74750825880.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc52d56b-d0ab-4fc9-bb9a-4f4cce770b1b/98423677578.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/630c2830-5a82-4e18-8179-4ae249de2e0f/rabafojumo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9a65b09-dd48-4d9d-9215-c4e09c95daef/43924406985.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_off00006c0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C0B 4864 bytes
SHA-256: 86752ee36b3165ac5db2b1a92a8dfd4fd8b53fdc12d90958deb294b1d36a3c77
font_01_sfnt_off00007caa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CAA 10200 bytes
SHA-256: 526d7af7cb2dc61a8b623e0cebb354eb8f9217f71da2c1d35f09746ca68c5364
font_02_sfnt_off00009f55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F55 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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