Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d818503d62cae51…

MALICIOUS

PDF

67.1 KB Created: 2020-08-16 22:21:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f32f2600d2388080c11030b09cec0f3c SHA-1: 1035cae2f9684c7dc3221757be65820bc9568d98 SHA-256: 1d818503d62cae5179db106a7538bc4480a0ccecc0638bcae457a89302bd5122
202 Risk Score

Malware Insights

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

The PDF contains a lure related to 'Freddie Mac home possible student loan guidelines' and embeds a link to a known malicious redirector. The PDF also contains a link farm, suggesting an attempt to manipulate search engine results or distribute content widely. The presence of a malicious redirector indicates the likely intent is to lead the user to a site that will host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=freddie+mac+home+possible+student+loan+guidelines In PDF document text
    • http://nolojopup.cuib.eu/uploads/1/3/2/7/132712615/tizufexonefupu.pdfIn PDF document text
    • http://files.trackingclubofma.com/uploads/1/3/0/8/130874210/3971527.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/1/0430/8313/7178/files/attached_book_reddit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3529/5905/files/17928712093.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7650/1147/files/fupowaviganavijazera.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5575/2103/files/zubub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7578/9215/files/99544768535.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4088/9240/files/16952317630.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4615/0039/files/zoburewuxigamev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9671/7992/files/vafikalivasowefuked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2422/0321/files/29719679207.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6375/4404/files/lipifajutikibose.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 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8BF 5580 bytes
SHA-256: e01f7d7d6ff64ebc157eb9f856e7660da7efdf4af27a230e9b549bb8655f0dcc
font_01_sfnt_off0000db84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB84 10352 bytes
SHA-256: 16163a931fd7712d061b83f749e2f1585f0472de9e793a7661ad770e1f541a7d

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