Malicious PDF — malware analysis report

Static analysis result for SHA-256 acb8a838e3ba95e3…

MALICIOUS

PDF

56.5 KB Created: 2020-08-11 07:05:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 473cbd15da1fab3ce93d5f7d8986d8a8 SHA-1: 8357661816257e08dddb79ee76da041d70da2ead SHA-256: acb8a838e3ba95e385db7c39a483c65a2c4ba44e140e729091ba1d497998dcb6
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The document body, though heavily obfuscated, appears to contain the URL for the redirector, suggesting a phishing or malware delivery attempt. The primary heuristic indicates a malicious redirector link, and the document body itself contains the URL for the redirector.

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=tamil+boy+baby+names+with+meaning+in+tamil+pdf In PDF document text
    • http://files.expeditiondance.org/uploads/1/3/2/6/132696117/kidekapomud.pdfIn PDF document text
    • http://files.penelopewylde.com/uploads/1/3/0/7/130775063/miwuniwitut-gezinezefazop-denamulubila.pdfIn PDF document text
    • http://files.adventurouspursuit.com/uploads/1/3/1/4/131438098/9652098.pdfIn PDF document text
    • http://files.ridgeclinicairliebeach.com/uploads/1/3/1/4/131437862/7420840.pdfIn PDF document text
    • http://files.australianprophecyschool.com/uploads/1/3/1/3/131398406/46bebaf8.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn 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/1/0432/1135/8369/files/public_finance_management_system.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/82483011388.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6825/2565/files/duzijikirakamof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2449/8333/files/fubozogopitixewigisemeter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4139/7656/files/raduvegonogimuvow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3676/2527/files/cambridge_igcse_modern_world_history_ben_walsh.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5222/1091/files/51906218884.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7496/7965/files/enlace_polar_y_no_polar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9390/7869/files/matezenobuwajoxazit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9659/5861/files/vetixorazavomakuvetu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00008d2c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8D2C 14988 bytes
SHA-256: b80a4f203b7e18417878fc68f4cdb02ec808aec83181e4e43bd6a76e7d2ffad0
font_00_sfnt_off00007a12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A12 5644 bytes
SHA-256: 722e36b88127544c3867f6284e2cf03385bf4ecb693f7f99fee6faa0691537d9
font_02_sfnt_off0000b2b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2B1 9908 bytes
SHA-256: ae8db9985761bba3bab53484c39ff1bd674f11900d5fadd26721a1e5db375c0f

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