Malicious PDF — malware analysis report

Static analysis result for SHA-256 87b52779fbb0fe51…

MALICIOUS

PDF

45.3 KB Created: 2020-08-14 15:39:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9c03d4747e5538a4f9d432188308ef25 SHA-1: b50c37514d92b5bf147bf7a1621a60623729a0c4 SHA-256: 87b52779fbb0fe51f7dadf5d9ab62814febdcaa3a0a0abd0651f6a23f3c71a15
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to "House roof cooling sheet" and a malicious URL, suggesting a lure for phishing or SEO spam. The presence of a malicious redirector and a large number of external links points towards an attempt to drive traffic to malicious infrastructure.

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=house+roof+cooling+sheet In PDF document text
    • http://files.pukapassion.com/uploads/1/3/0/7/130776388/8067236.pdfIn PDF document text
    • http://dosejijew.chloescheel.com/uploads/1/3/1/3/131383936/3900959.pdfIn PDF document text
    • http://linid.practicingsomatics.com/uploads/1/3/0/8/130814933/fapuxumeranufow_poxejoxik_padopoworuxe_dibof.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/1/0439/2943/6315/files/14173234591.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4715/7911/files/amadeus_basic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7689/4372/files/12545773046.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5340/6618/files/zuzumemipet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3239/5426/files/gunojiraminazek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2746/3324/files/mokemelinipikidalimi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2482/6014/files/94311336944.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6849/6798/files/binapajif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8347/2802/files/25423552749.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rixiridujafogidubiba.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 1

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_off00006f26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F26 4892 bytes
SHA-256: fd1654bc8ded5d96e71bff1cf3d4d84a79bd1feb8deed883f45298730182b1ad
font_01_sfnt_off00007fc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FC5 13056 bytes
SHA-256: de5f64bc9b64bbb4662c3e4b86cf62d942034a42d873b66fd54c171bd3e3eb8b

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