Malicious PDF — malware analysis report

Static analysis result for SHA-256 1142d308d29edd4a…

MALICIOUS

PDF

52.3 KB Created: 2020-07-29 04:53:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: dd53e7d22580068f06b57b1c2c04e989 SHA-1: cb9120e70bf9435bce0df318980622348c798ddb SHA-256: 1142d308d29edd4a4a10b04f2003e7fa5d9a32367e6016b7ece5fbbcd75c4f74
194 Risk Score

Malware Insights

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

The PDF contains multiple links to a redirector URL, identified as malicious. The document body, though heavily obfuscated, suggests a lure related to 'parallelogram properties worksheets'. The presence of numerous external PDF links, including one to a Shopify domain, indicates a link farm or SEO manipulation tactic to distribute malicious content. The ML classifier strongly flagged this PDF as malicious.

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=parallelogram+properties+worksheets In PDF document text
    • http://files.partridgehighlands.net/uploads/1/3/0/8/130814682/tamefusuwomeximu.pdfIn PDF document text
    • http://files.cookingsavvyblog.com/uploads/1/3/1/3/131381675/8004907.pdfIn PDF document text
    • http://files.pierceplayers.org/uploads/1/3/1/8/131856446/800747.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/1/0436/1990/9794/files/xanipurixatakorito.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7661/6341/files/57279376612.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9121/3980/files/penagiseruru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78046530146.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6404/1373/files/73802161675.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0726/2370/files/pesig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6713/7438/files/15569690057.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0611/6511/files/ziwunilew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/95320922989.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0692/4712/files/33232688408.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1895/2612/files/5629661364.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 1

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_off00007a53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A53 5072 bytes
SHA-256: a70effb01ba092e937508a910d6c0e11cffe1493c1bbfb480e590f726ba76152
font_01_sfnt_off00008ba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BA0 9964 bytes
SHA-256: 11353e0c5b9b9e072ac9c50b3598c132b7b2c98d9f49cc6c5a95c5505b67fbcf
font_02_sfnt_off0000adda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADDA 16284 bytes
SHA-256: 61cc66c40684a8d20589f33230807071cbab6d5e39727ead1949cbbea0e9c85a

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