Malicious PDF — malware analysis report

Static analysis result for SHA-256 b23fefd276dc3362…

MALICIOUS

PDF

42.9 KB Created: 2020-08-26 05:59:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 99acefde84066966c417544461a5ce68 SHA-1: 20a73c3b44eb5d74007f5ab06bf62b367600f904 SHA-256: b23fefd276dc336243ce6c8b6e3fcc3cafa0aaf730e55404d74e3057cc3cefc3
202 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, contains text suggesting a lure related to interview follow-ups, combined with urgency language. The primary malicious IOC is the redirector URL, which likely leads to a phishing page or malware download. The file also contains a large number of links to other PDFs hosted on Shopify, potentially for SEO manipulation or to obscure the malicious redirector.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=thank+you+letter+after+second+interview+examples In PDF document text
    • http://files.eastasiaelite.com/uploads/1/3/1/8/131856108/ca648.pdfIn PDF document text
    • http://files.helpinghandsrescue.org/uploads/1/3/2/8/132816036/gijanivomed.pdfIn PDF document text
    • http://tudaf.woodsinbloom.com/uploads/1/3/1/4/131407552/9861067.pdfIn PDF document text
    • http://files.rooseveltvanderbilt.org/uploads/1/3/0/8/130813511/vewatagej.pdfIn PDF document text
    • http://files.unstoppableachievers.com/uploads/1/3/1/1/131164568/ab0f4d58f.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/1/0433/0687/7080/files/peboginesewuxexadamo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8245/7000/files/buzojenafiwibujug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/6437/3927/files/lookup_function_in_reporting_services.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9959313526.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lofexunixepufatomubudabak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6406/5188/files/10241625142.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5453/8656/files/california_dreamin_chords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6241/1942/files/pogisasajoluvexuwilowiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3160/8989/files/markup_drawings_on_ipad.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 5

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_off0000672e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x672E 5728 bytes
SHA-256: 323c49e3246a59db754dd24e1d3c1e7e24f8cf98af1159b9edb566bb7ef1e6a9
font_01_sfnt_off00007a9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A9B 10552 bytes
SHA-256: 1b7553afa97a92746444c7132d52707734cd68228f3704a3fca5cdda3a353a6a

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