Malicious PDF — malware analysis report

Static analysis result for SHA-256 5148aab08c398662…

MALICIOUS

PDF

40.7 KB Created: 2020-10-04 01:09:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 5dd16d860b51b5604b202fb2b4f5d065 SHA-1: e823fffd88906e9617cea3c255b4148c59d8d9ec SHA-256: 5148aab08c398662220166a68195da559b4bea20af36f64b5d5bf998242daff0
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a malicious redirector link pointing to 'https://cctraff.ru/strik?keyword=android+oyun+club+gta+vice+city+indir'. This link is flagged as malicious and likely serves as a lure to download further malware or conduct phishing. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the presence of a malicious URL within the document body is a strong indicator of malicious intent.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=android+oyun+club+gta+vice+city+indir In PDF document text
    • https://site-1037193.mozfiles.com/files/1037193/97540246803.pdfIn PDF document text
    • https://site-1039636.mozfiles.com/files/1039636/89658098433.pdfIn PDF document text
    • https://site-1038674.mozfiles.com/files/1038674/12505470579.pdfIn PDF document text
    • http://files.familydogs.com/uploads/1/3/1/4/131410812/1262372.pdfIn PDF document text
    • http://files.theportalsf.com/uploads/1/3/1/6/131606420/tizomawiwetiwi_dunoj_domibikezulejod.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/1/0484/2730/3080/files/vegetable_oil_chemical_structure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/9555/1903/files/31921563002.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7437/9157/files/tim_duncan_kids.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/5085/6348/files/the_book_of_beautiful_questions_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdca58d4-3725-4ce3-898f-aa764b8abaa6/68844211833.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f295621f-2828-4216-82d5-8b8e34bba4c5/mopowikimifuzagagudofili.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f679302e-7960-4e63-b998-90507b09e040/subadomorasek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50c892c4-4095-4c19-8860-f1d92cf8ffc7/tunisakuvoxiruzasojes.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6176 5220 bytes
SHA-256: 173422847e7d5c16ad4dcce1c86a352ee9beecb08797fed8a3d70e9b22a4b718
font_01_sfnt_off00007356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7356 10096 bytes
SHA-256: 91124f36bb02fce88ffe064982c485762c38c27f823dea1f70f54ec2091ec703

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