Malicious PDF — malware analysis report

Static analysis result for SHA-256 084b88bedb77d6ba…

MALICIOUS

PDF

59.8 KB Created: 2020-08-22 23:50:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0b3c87848159c83d05e9d8f887df0a66 SHA-1: 583d5e2af08038a5016540088247d8743abeb248 SHA-256: 084b88bedb77d6ba39d750e7f9e34e8bb7dead185bdf7bf73d42de50f7e96f4a
194 Risk Score

Malware Insights

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

The PDF contains numerous links to a redirector service, which is a common tactic for phishing and malware distribution. The document body, though heavily obfuscated, contains the URL that is also present in the heuristic findings, suggesting it's a lure to trick users into clicking. The ML classifier strongly indicates maliciousness, and the presence of redirector links points to a phishing or content-luring attack pattern.

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=active+passive+voice+pdf+in+gujarati In PDF document text
    • http://files.paulsegers.com/uploads/1/3/1/4/131407918/45e264f23d.pdfIn PDF document text
    • http://files.911bodyresq.com/uploads/1/3/0/7/130776118/natarudul-wasawebi-pifag-nisaneneduk.pdfIn PDF document text
    • http://zomiwesoz.goodshepherdsfoundation.org/uploads/1/3/1/3/131383363/6226364.pdfIn PDF document text
    • http://files.simonbrookercoaching.com/uploads/1/3/0/8/130874535/pepemoritulixowejov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.indictrans.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3871/9648/files/46138470531.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5667/7543/files/bosopa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8524/2269/files/double_addition_worksheets_with_regrouping.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6134/6466/files/security_testing_interview_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6617/1287/files/5690765111.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9244/3303/files/fuximurunilokeko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1466/5878/files/kali_linux_wifi_hacking_software_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9015/7474/files/guzadamalo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2100/7005/files/pdf_to_word_converter_apk_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0333/7114/files/marriage_certificate_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/5568/5288/files/zefenojawe.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7827 5296 bytes
SHA-256: eb358b8bb8551f05ca60d1eee24ee48bb5afbb1cd10f57ef2b964da8027b91ca
font_01_sfnt_off00008a3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A3A 12356 bytes
SHA-256: 2e84605853c6c7aa916f8f9e7d5d2a9517323c815bcc3c39ce4f94d23c29c57f
font_02_sfnt_off0000b16e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB16E 10124 bytes
SHA-256: 42888a5e5b365f502cf48f9526d25e3a1b242539a18b2a5577790cca9019e1d5
font_03_sfnt_off0000d3bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3BF 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c