Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa75d3f5edbcc153…

MALICIOUS

PDF

36.1 KB Created: 2020-08-11 06:20:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0a8ef66f3fe2f151fa01644124fe4cc2 SHA-1: 606cea821a91fc39c7c39c226dccb5645e78e75f SHA-256: fa75d3f5edbcc15307d8a374f24289cf91df65c6fca204d098e55f4167055d64
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. This redirector is designed to lure users into clicking through to potentially malicious content, disguised as a PDF about Tinkercad keyboard shortcuts. The ML classifier strongly supports the malicious nature of this PDF.

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=tinkercad+keyboard+shortcuts+pdf In PDF document text
    • http://files.charveypublications.com/uploads/1/3/0/8/130873708/1e979f53.pdfIn PDF document text
    • http://files.therapymcb.com/uploads/1/3/2/6/132695408/tikuvune.pdfIn PDF document text
    • http://rimoku.liguangyi.com/uploads/1/3/1/3/131379362/lawinokide-moxusi.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/1/0428/7738/6911/files/4813725832.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3182/1468/files/achyutam_keshavam_krishna_damodaram_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2638/9912/files/bums_syllabus_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5651/3692/files/53911425123.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0487/9267/files/76074589789.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3606/5438/files/65236684905.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9896/4117/files/fogupofiferixinupegafogap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9649/6544/files/kavopimusaxepojutu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1909/2647/files/giwoje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7115/2023/files/kutojobox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5622/5694/files/nimugixezutasole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9667/0365/files/38566164359.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8216/2084/files/jubiguba.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 4

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_off00004f21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F21 5464 bytes
SHA-256: f9fb5c7c6f4fd7b4e8fb14138941e84de5c590ac0b763c54c785df5b479b7164
font_01_sfnt_off000061aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61AA 9920 bytes
SHA-256: cae3dccfc4c8f7da788b19bbd98206499fe308979463c8a82793426632b25cf8

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