Malicious PDF — malware analysis report

Static analysis result for SHA-256 82d920259a739eb5…

MALICIOUS

PDF

40.1 KB Created: 2020-08-22 10:15:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8186b80f89eaef050a726fd345144881 SHA-1: 6ab686407a72b0b2b29cc5b145fe4da1ac623549 SHA-256: 82d920259a739eb5df1c5608822eeda5d13dda830916f37b22488b90b8b018b7
234 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to a redirector service. The document body text, though partially corrupted, includes a URL that appears to be a lure for downloading 'whatsapp stickers android apk free'. The presence of numerous external links and a redirector suggests an attempt to drive traffic to malicious or phishing content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://ttraff.cc/pify?keyword=whatsapp+stickers+android+apk+free In PDF document text
    • http://petitaz.khsphotographers.com/uploads/1/3/1/1/131164250/zekelixo.pdfIn PDF document text
    • http://files.merakihandmades.com/uploads/1/3/1/4/131483386/888352.pdfIn PDF document text
    • http://files.melbournesupercarspotters.com/uploads/1/3/0/7/130739631/5049296.pdfIn PDF document text
    • http://files.happywayhealing.com/uploads/1/3/0/7/130775838/sijepo_velekizofuroja.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/1/0431/1898/5372/files/pisorotuwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0294/2872/files/fundamentals_of_chinese_characters.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4699/3063/files/woxaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0687/6055/files/nokaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0729/6163/files/setepirulo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1361/1421/files/online_converter_to_jpg_with_high_resolution.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9499/0231/files/pupaporalupoxeje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4046/4281/files/xewimedakufixemu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6128/8868/files/votiviritezoketawameleza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8333/2772/files/22899097762.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

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F3D 5288 bytes
SHA-256: 7a41c0d8df6391853e24b4399c261b485024b4243a21668e8ec3b5db136aadcc
font_01_sfnt_off0000713a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x713A 9996 bytes
SHA-256: f5523b6b42d18dbd1294ae09d2a7e378f5a75829940738f1655e865acc1e0758

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