Malicious PDF — malware analysis report

Static analysis result for SHA-256 f552fcb7a4812e19…

MALICIOUS

PDF

43.9 KB Created: 2020-08-09 07:44:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e83768beeae05b251195b4b1d2e084ff SHA-1: 9f7142b556a7cb11bd405cd256e3c9b39acf1e68 SHA-256: f552fcb7a4812e196d734e3484f0967d05fa78dac02792241603f29330d1f5f5
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO poisoning tactic designed to lure users to malicious content. The ML classifier also strongly indicated maliciousness.

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=learn+portuguese+pdf+free+download In PDF document text
    • http://gepali.midcom-group.com/uploads/1/3/0/8/130814328/ede4f4.pdfIn PDF document text
    • http://files.nourishingrootswa.com/uploads/1/3/0/7/130775825/buvafodupinur.pdfIn PDF document text
    • http://patozite.laurabain.com.au/uploads/1/3/2/3/132303189/27919cb9269.pdfIn PDF document text
    • http://files.tillerridge.com/uploads/1/3/0/7/130776200/nalipazusosobomur.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/1/0440/1725/4558/files/pusenimenu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3216/7068/files/wetijodolav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8789/6488/files/jaxaxonixetenevepoxiregu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6310/0070/files/25282752725.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7013/6218/files/zuwotawekilebirog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1310/2998/files/nafevavijapulaxopopu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0265/0014/files/loretta_swit_death.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5907/6502/files/mount_and_blade_viking_conquest_companions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/11144572984.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1760/0152/files/11019740086.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/bujimigovari.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
🗂 Part of campaign: lucypetersonwatkins.com 3 samples

Related samples 6

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_off00006d63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D63 5240 bytes
SHA-256: 5247b15a63d20273ebaea66475d95337c037b045122ae4d0c4a47ab8650c4073
font_01_sfnt_off00007f60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F60 10408 bytes
SHA-256: da8ef21714000ae1d3b4a47d95126392e117216786c1551544f64604517885ca

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