Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e9ddff46f881fb3…

MALICIOUS

PDF

55.2 KB Created: 2020-11-02 03:16:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: afadc4860105141279cdeacbd2907b1f SHA-1: 3517c13e86532eb29a9acc486147fbf74e6b7b3a SHA-256: 1e9ddff46f881fb353be8c01d10f16d378b3623f46b3a5fb9b2a6ac6ef8daa8b
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a redirector URL that is known to host malicious content, specifically targeting users searching for 'monster legends apk download'. The presence of a large number of external PDF links suggests a link farm or SEO poisoning attempt to drive traffic to malicious sites. The ML classifier also strongly indicated maliciousness.

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=monster+legends+apk+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380691/normal_5f93b1b252d40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374685/normal_5f89141b7ad5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f8765c135a11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425506/normal_5f9c13199cb51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393911/normal_5f91a1c3b27d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408184/normal_5f9b34e3b633b.pdfIn PDF document text
    • https://durabaseduxoj.weebly.com/uploads/1/3/4/2/134235759/xotujizazute-kenev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379601/normal_5f8d5457b9d44.pdfIn 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/011fbfdb-c714-4f8e-817f-efdefff044ce/2158079335.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/7468/0469/files/gulawadenusugamume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a81d687-d5e7-4cbe-b631-50829f1e6a2d/65756812460.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9732/8283/files/wunazeromekisi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7020/1760/files/28966075307.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74e2a4bf-7659-481e-88dd-bf72f7069e94/fitidegilulozafonisuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/2460/2055/files/cms_athletic_zone_ticket_to_play.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61E4 3092 bytes
SHA-256: 748463d538f394c36e0ce12e91c8bacc08312cd742e4832d226baab0c9a6d45d
font_01_sfnt_off00006ccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CCF 5288 bytes
SHA-256: c0ad612726055105f0ef8b110f3a3a6772d8bb7ee3912a547554df09e3ff4342
font_02_sfnt_off00007eef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EEF 2140 bytes
SHA-256: a1c68180eae955d710b1f59d89b7b5bb1f22246194deffa7b9c3298859733f9b
font_03_sfnt_off000088c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88C7 11724 bytes
SHA-256: 641679fb16dc453d367bff7366fb86d400bb69a28c72ac5837827f2decbf9932
font_04_sfnt_off0000b043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB043 16212 bytes
SHA-256: efa10eb016e3f3b0b4b9ca88735192a2169c3e2ea1838fdfae102cdad0ae9fb6
font_05_sfnt_off0000c58c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC58C 1736 bytes
SHA-256: 5095ccdfdd328c3f25b1766e9c65bca58fa839170fcb9f3db3c20e130d955aff

Open this report in the interactive analyzer, or submit your own file for analysis.