Malicious PDF — malware analysis report

Static analysis result for SHA-256 f77ffaec1b5bdb85…

MALICIOUS

PDF

48.8 KB Created: 2020-08-05 05:08:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2780ad73cba278a90d2d0ab2f2ccc5ae SHA-1: f8e1149bc48b7058db2aedb228127ef5f2c69762 SHA-256: f77ffaec1b5bdb8597e966e5ecaf050dc98f37977c7837e2a4096d5c57d23f45
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to PDF files hosted on various domains, indicating a link farm. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which further directs to content related to 'abdul kalam speech to school students pdf'. The ML classifier also strongly flagged this PDF as malicious. The presence of numerous external links, including a malicious redirector, suggests an attempt to drive traffic to potentially harmful websites or download further malware.

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.com/pify?keyword=abdul+kalam+speech+to+school+students+pdf In PDF document text
    • http://files.jaredjaggers.com/uploads/1/3/1/4/131453111/susezotuwimut_vanela_babokejite.pdfIn PDF document text
    • http://files.shantellstricklanddavis.com/uploads/1/3/2/6/132695492/7880082.pdfIn PDF document text
    • http://files.nefertariliving.org/uploads/1/3/2/7/132712268/147264.pdfIn PDF document text
    • http://files.nsjp.biz/uploads/1/3/1/6/131606256/didadewaligevel_wuzaziwomaxew.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/1/0437/9115/5361/files/92927197065.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5829/1093/files/ritelebijaluximesus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2779/9957/files/92468601075.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7341/3032/files/44415153479.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mefiwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7061/1861/files/vunadezodasujibuzanul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2364/6365/files/differences_between_c_and_c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51268900441.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5671/7207/files/87646685339.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/6386/5497/files/advantages_and_disadvantages_of_parliamentary_system.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3462/4668/files/11425087204.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4189/7110/files/steam_download_speed_cap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4112/0679/files/10992457869.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_off00007ebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EBF 5492 bytes
SHA-256: 4631ad2c4447ba5fde4b155c5f9b8c5a5844598f93d28c2d4dcbaa5fa5adfc11
font_01_sfnt_off00009149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9149 10856 bytes
SHA-256: 555929aa33cc9776b2201bb23529503127e7682a764d0e499dbb6e85dff7e8f9