Malicious PDF — malware analysis report

Static analysis result for SHA-256 370c03e626d892ea…

MALICIOUS

PDF

55.3 KB Created: 2020-08-25 01:40:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8987e25a7b5a29fb79bd2aa54adbd4dd SHA-1: 472153caf7cb4c67e6371c47beaade00951b09dd SHA-256: 370c03e626d892ea41c7158cfc9d48f8e8b2623955269bdaa505bcd43d554452
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a significant number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the string 'airserver full crack' and the malicious URL, indicating a lure for cracked software. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the presence of a link to malicious infrastructure, and the PDF_SEO_LINK_FARM heuristic suggests a large number of outbound links, typical of SEO poisoning or link farm abuse to mask malicious activity. The primary intent appears to be redirecting users to the malicious URL for further exploitation.

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=airserver+full+crack In PDF document text
    • http://files.midlothianart.academy/uploads/1/3/1/4/131483184/f46aa323e1f3.pdfIn PDF document text
    • http://files.roeslesportsconsulting.com/uploads/1/3/1/4/131406610/eb20fccb0ecf1c5.pdfIn PDF document text
    • http://files.ecmstudy.com/uploads/1/3/2/7/132711947/8d7668123d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1619/9066/files/deutsch_aufgaben_1._klasse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9174/5185/files/wevoson.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8980/5983/files/nipufaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9977/4364/files/burmese_days_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0250/9987/files/frp_bypass_apk_samsung_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0466/4947/5237/files/xowevunutomu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/metegemekipezafekude.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/77580222310.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0279/7986/files/70968866909.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000855c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x855C 4576 bytes
SHA-256: 8408a7f1ab0830c66fe24c3b62e968558c39ea2901aeb356e8c35acae65003e7
font_01_sfnt_off000094f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94F5 14452 bytes
SHA-256: 90f35dad4e852e5f8b79a03a9c12d259fff4e2a1fdfb1217097baa87dff9cccd
font_02_sfnt_off0000c23a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC23A 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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