Malicious PDF — malware analysis report

Static analysis result for SHA-256 c878399be4cd8585…

MALICIOUS

PDF

47.2 KB Created: 2020-08-09 12:08:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 69608657f29a46dd09964a61b72b4bcb SHA-1: b829f483d013991ecf5bc90c95c8d41cd0f7e382 SHA-256: c878399be4cd85855de0a8eb3c2c7d60b986f0b33c8d58dbd1799cf92ffab55b
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be the same as the malicious redirector. This suggests the document's primary purpose is to trick the user into visiting a malicious site, likely for further exploitation or credential harvesting.

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=stereochemistry+of+allenes+and+biphenyls+pdf In PDF document text
    • http://dorotikiv.cdestem.com/uploads/1/3/1/3/131384169/5985a4f4d956a.pdfIn PDF document text
    • http://files.bollywood-dreams.jp/uploads/1/3/1/0/131070866/2255929.pdfIn PDF document text
    • http://files.kolaccountants.com/uploads/1/3/1/6/131606321/1ddc630e802e46.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/1/0441/2728/9496/files/lanozagozutimafurotepew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8684/7905/files/3075533858.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6372/1637/files/96086775327.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3393/5515/files/vuwububakatik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/4897/1938/files/bgp_cisco_press.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nasidobedibugamis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/82906209367.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5861/6733/files/98353290242.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1869/8400/files/controlled_oral_word_association_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1682/2692/files/revirilasan.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 2

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
font_00_sfnt_off00006b4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B4F 5528 bytes
SHA-256: 8368a0e7cc6c850be12f9eba317250fd66cfc12bedb8c31e97f3e36a5a27f930
font_01_sfnt_off00007de5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE5 10412 bytes
SHA-256: 67982d4aa2d24d31628671ee0b8b25f4957d61a6d48370aefaa0225e547f0bb0
font_02_sfnt_off0000a18f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA18F 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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