Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d9ba5c9264fd7b5…

MALICIOUS

PDF

40.9 KB Created: 2020-08-23 21:39:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ac74ac7c19dbe7fb16d1e734c6e8bccc SHA-1: 74695df9302ffba4a50cf7893ea3dad4e0db5cb1 SHA-256: 4d9ba5c9264fd7b54b802119c22ead30ec0b10710a3ba1125998377648b6d2f2
194 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though obfuscated, contains text related to 'uscis form i 130 checklist' and a URL pointing to a malicious redirector. This suggests a phishing attempt to lure users to malicious content.

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=uscis+form+i+130+checklist In PDF document text
    • http://pikodes.oxtedultrasound.com/uploads/1/3/1/3/131398367/883c7988f20.pdfIn PDF document text
    • http://xivevu.tremormassagetherapy.com/uploads/1/3/1/0/131070581/85b27f958697d6.pdfIn PDF document text
    • http://files.lakewoodactivities.com/uploads/1/3/1/3/131380480/relineta_wojabomakuj.pdfIn PDF document text
    • http://didezur.schecktech.com/uploads/1/3/0/7/130739678/e350a.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/1/0428/3393/6547/files/joindre_en_ligne_gratuit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5061/4429/files/73148089009.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/tututerudujoga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6051/7271/files/cecil_internal_medicine_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6574/5312/files/wamurez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/94686352225.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8463/4530/files/miwel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9623/5415/files/naruto_shippuden_ninja_reborn_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3662/2498/files/autocad_2010_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6054/4156/files/41986104071.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7003/7911/files/perixadugavaj.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 2

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_off0000623b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x623B 5324 bytes
SHA-256: 5c878b4cb8ab27175319b5ca4b60b18f11ed5159a82988ce036951552dc75431
font_01_sfnt_off00007439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7439 10204 bytes
SHA-256: aef547d90912eaad38ca7f1450173d3de90d4a93c0b16de291c4433c4877855c

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