Malicious PDF — malware analysis report

Static analysis result for SHA-256 9825366cacc206d1…

MALICIOUS

PDF

47.6 KB Created: 2020-08-08 12:54:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 871329fe9a79245bbedee672d339f559 SHA-1: e76d81b3b98df99ac8dc113871fc07311846fcae SHA-256: 9825366cacc206d18b67eaa33c0b95116393485549bd753480561d0354143910
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=basic+electrical+by+bl+theraja+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The presence of a PDF link farm heuristic further supports the malicious intent, suggesting an attempt to distribute malicious content widely. The document body, though heavily obfuscated, contains the same URL, reinforcing the lure.

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=basic+electrical+by+bl+theraja+pdf In PDF document text
    • http://files.leiaryan.net/uploads/1/3/0/7/130738620/4136771.pdfIn PDF document text
    • http://files.lefthandedgolfaustralia.com/uploads/1/3/1/8/131871558/e3f646fe.pdfIn PDF document text
    • http://binope.morganhomesliving.com/uploads/1/3/0/7/130775085/robafolunum_porelu.pdfIn PDF document text
    • http://files.drlesliejenkins.com/uploads/1/3/1/3/131379054/jokuvoduguduxijepeg.pdfIn PDF document text
    • http://files.agelessfitness.net/uploads/1/3/1/4/131407112/acbb9908fa0.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/1/0434/0501/7238/files/jowutakodijuju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0250/2048/files/bhagavad_gita_original_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2007/4663/files/82130291267.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4489/6925/files/62513010717.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12339474235.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3029/0327/files/ronanebotumotukufo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5710/9402/files/97007401810.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0225/7823/files/62381861407.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4601/8967/files/circular_doubly_linked_list_program_in_c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1737/1797/files/libabopuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5340/7646/files/brahma_vaivarta_purana_telugu_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50537202024.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2771/0630/files/nanujekuviwuwo.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_off0000661f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x661F 5612 bytes
SHA-256: 97a99bbb706b85f10d25dd9036cac000e01b4dd598d4146be245e1804839560a
font_01_sfnt_off0000792d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x792D 2116 bytes
SHA-256: 3d710a4b121cc3492c3eb33a949758d423697a96dc6070b99fa40abea3aa876d
font_02_sfnt_off000082f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82F9 14672 bytes
SHA-256: 6b24577e572b055a253c6476bd4ecdd656195fc57af5d1f9ee39edd44df89cb3