Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d7d5c12078daf54…

MALICIOUS

PDF

45.3 KB Created: 2020-08-04 15:58:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 737c83ce077c7dbfaba53d1540af3f9c SHA-1: 30e2911fbb7b940c8803b0b3be69fe197bf79d0c SHA-256: 7d7d5c12078daf54ba87a81dde8b6715a935bfc18af4b03d437b34bf3fd31db1
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious URL, masquerading as a free download for academic materials. This is a common lure for phishing or malware distribution. The ML classifier strongly indicates maliciousness, and the presence of numerous SEO-optimized PDF links further supports a malicious intent to drive traffic to potentially harmful content.

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=ignou+assignment+front+page+pdf+free+download In PDF document text
    • http://files.perhappened.com/uploads/1/3/1/1/131164153/tekidimuvani_bafasajo_tetuvukoweni.pdfIn PDF document text
    • http://files.corneliahoogland.com/uploads/1/3/1/4/131452799/9403076.pdfIn PDF document text
    • http://files.yuocreations.com/uploads/1/3/1/8/131856331/572bc13a7e.pdfIn PDF document text
    • http://files.preecelightning.com/uploads/1/3/0/9/130969190/a2546e4.pdfIn PDF document text
    • http://files.itsjust700.com/uploads/1/3/0/7/130775970/fa1000a7.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/1/0427/9461/4940/files/xavamelesifomepegasubik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2577/6288/files/lowes_springfield_il.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6844/9180/files/wigetewowaginurotit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6863/7862/files/67874397201.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3928/4645/files/nojeruzoxepotodisez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1980/4567/files/50342555184.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3137/9618/files/pebedukobekurigitejefu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8890/3325/files/android_game_hacking_tool.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3041/2453/files/79958541560.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8922/2045/files/nefinar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3093/6732/files/nilujunaronozepefutixup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8298/1281/files/14305868295.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_off000065e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65E4 5272 bytes
SHA-256: 3f8725592ae1b7dd01f5e6c8d3ab04646495d10f2850542ef623c788c649a829
font_01_sfnt_off000077cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77CD 9900 bytes
SHA-256: 763bf0abad5a73c376745554a33806f501dcc3fdfda62a56a9f37883971fd76b
font_02_sfnt_off000099b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99B0 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333