Malicious PDF — malware analysis report

Static analysis result for SHA-256 528ac654bebdfdc0…

MALICIOUS

PDF

45.6 KB Created: 2020-08-19 14:43:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a8979da4b4e14b4b6a317bcae1078153 SHA-1: d1ed9a75fe310272c8da9fdf3a407573bb96ead0 SHA-256: 528ac654bebdfdc0576c989d97ab828ce5ffa30a542f44cd2e56f1e393680950
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying a malicious redirector. The document body, though corrupted, appears to be a lure for a 'Hadoop command cheat sheet'. The primary malicious URL, https://ttraff.ru/pify?keyword=hadoop+command+cheat+sheet, is a redirector designed to lead users to further 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.ru/pify?keyword=hadoop+command+cheat+sheet In PDF document text
    • http://files.kimsplaceco.com/uploads/1/3/2/7/132740327/f29fbf72079c6.pdfIn PDF document text
    • http://files.thingsfromthebasement.com/uploads/1/3/0/7/130776646/4569584.pdfIn PDF document text
    • http://files.shepherdshousenazarene.net/uploads/1/3/1/3/131398117/7553195.pdfIn PDF document text
    • http://files.fcdetail.com/uploads/1/3/0/7/130739175/kaloxetusotat-jemezizi.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/1/0438/6439/1845/files/digajo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/xosojewuwuwagojis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6089/4627/files/89016702382.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5205/6227/files/79711599186.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1284/8790/files/30785363225.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6731/0231/files/71999908362.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6393/4109/files/puzenipufiposegafupimori.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sividejujim.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: fcdetail.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_off0000675b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x675B 5144 bytes
SHA-256: f6affaec6b7277065f46add2847910785ad56015f0eefe14680641b0f36ee81b
font_01_sfnt_off000078ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78AC 15856 bytes
SHA-256: ba3e753c093884b37dc4741a79c69dceee043c5b01efe994d2f0b0fa929af952

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