Malicious PDF — malware analysis report

Static analysis result for SHA-256 834f23bfce99b58e…

MALICIOUS

PDF

45.8 KB Created: 2020-08-22 19:33:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 974ab560e72757c3a58f914138b22551 SHA-1: afed3c1a7cd946ade1838f4b8c395322def3579c SHA-256: 834f23bfce99b58e4b7e469c32e4ca3960ec0767903438d5b872dcb33ab494ea
194 Risk Score

Malware Insights

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

The PDF contains embedded text and multiple URLs, with a critical heuristic firing for a malicious redirector link. The document body explicitly mentions "Hungry shark world hacked apk ios" and links to a redirector URL, suggesting a phishing or scam attempt to trick users into downloading malware. While no scripts were directly extracted, the PDF structure and linked content indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://ttraff.cc/pify?keyword=hungry+shark+world+hacked+apk+ios In PDF document text
    • http://xaloxigu.windowsmanchester.com/uploads/1/3/1/4/131483254/4322674.pdfIn PDF document text
    • http://vomamix.midwestmattress.net/uploads/1/3/1/3/131379530/2146189.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/1/0430/2562/9335/files/weight_watcher_sample_menus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1915/8183/files/givixe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9336/0791/files/89958655858.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31968244380.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3778/4224/files/free_acrobat_pro_2017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5832/3865/files/chemistry_periodic_table_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7940/1632/files/38001168407.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8506/1541/files/nelimagupug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4914/8828/files/23027731960.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6056/0021/files/4720589391.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0944/0933/files/kebekoxidiwap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/1676/8923/files/85327596906.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9770/2046/files/86496447188.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1531/3307/files/63568237973.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_off0000659f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x659F 5356 bytes
SHA-256: 5a3f3b149b690608da44514253ac8c2a55f1f49b4cbad25569093f88aa56348e
font_01_sfnt_off000077cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77CB 10580 bytes
SHA-256: 8afaa9968145862d3d0eeffca9e388ab83931947033b97fd7f8aeebd644b4fca
font_02_sfnt_off00009c04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C04 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71