Malicious PDF — malware analysis report

Static analysis result for SHA-256 71badc7e9eaf7b1b…

MALICIOUS

PDF

46.2 KB Created: 2020-08-16 16:58:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bc5e7146a39bae4d7ba8dfe32e8320dd SHA-1: b77826f9f39e94a881eb2ddc4dbc02502ce4e106 SHA-256: 71badc7e9eaf7b1bbe4bff975094682798136ef25d903db96346e0b4b0fd24f4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, including one to a known malicious redirector, suggesting a phishing or scam attempt. The document body, though partially obfuscated, mentions 'motor oil guide pdf' and includes the malicious redirector URL, indicating a lure to trick users into clicking. The ML classifier also 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.cc/pify?keyword=motor+oil+guide+pdf In PDF document text
    • http://lenepe.lorenasantacruz.com/uploads/1/3/0/9/130969352/xuzesosezuvibakafom.pdfIn PDF document text
    • http://files.aspoonfulsparkle.com/uploads/1/3/1/6/131637658/7591832b.pdfIn PDF document text
    • http://files.lcsupperclub.com/uploads/1/3/0/7/130739170/negimobamunubefel.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/1/0430/0003/7527/files/95638573209.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0384/5541/files/geranalepub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7496/1059/files/jirularurogupelij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7785/1550/files/avastar_free_2015.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5661/0971/files/mawixafagavurewadivexisi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4583/8232/files/bahrain_newspapers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6727/5424/files/13112857753.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1356/0727/files/tususiwade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/57155008281.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 3

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_off000079be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79BE 4828 bytes
SHA-256: 7850a8162fa0e287c4b134a9971e08fd90b526d21e613d44073c0a372d6d5866
font_01_sfnt_off00008a4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A4A 9980 bytes
SHA-256: 25f313e439b3bd0d791237c94e13d77a2a561da87dfefdf52fde6ddd36651f60

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