Malicious PDF — malware analysis report

Static analysis result for SHA-256 983f53ebad760b7a…

MALICIOUS

PDF

39.2 KB Created: 2020-09-12 23:00:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d5543fc357d8c8e636b7956f736b208e SHA-1: 33da28be03ba1bc5852f21dd2f0d607e033b9133 SHA-256: 983f53ebad760b7af47683e94fedc8ddf1575f80d5e4aedca19878b145056926
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which leads to a URL containing 'force format sd card android apk'. This suggests a social engineering lure to trick users into downloading potentially malicious Android applications. The PDF also exhibits characteristics of a link farm, with numerous external links, many of which point to PDF files hosted on various domains. The ML classifier strongly flagged this PDF as malicious.

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.link/wix?keyword=force+format+sd+card+android+apk In PDF document text
    • http://files.theinsightfulmum.com/uploads/1/3/0/8/130874218/gilopakugokuj_zorigasirol.pdfIn PDF document text
    • http://files.lvccpp.com/uploads/1/3/1/1/131164185/sutenoto-xovad-zujevam.pdfIn PDF document text
    • http://files.roxstardance.com/uploads/1/3/1/3/131398020/9896873.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/1/0430/8477/5577/files/verepixuvoxusamelajup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1218/5502/files/60677102441.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8589/7627/files/zitowiwanevulo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3993/2067/files/15218032362.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2643/1652/files/calcestruzzo_armato.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6116da_927be63ea7b44ce7bace78f717bc3b14.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ff68bb_55b4ef459e0e413c84d0e1d98949c92a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/717a42_d95ae76468b44b6eb18eee0e2b91daa6.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 8

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_off00005bb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB4 5288 bytes
SHA-256: 530da7abcc17a3a7eba26dd2ca58bb7fcd5870127ecf8f8bc1289bdb75bf817e
font_01_sfnt_off00006d9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D9E 10260 bytes
SHA-256: 56d96fc2f6821c9345440a6e64cee4f8f05cfde15a2da3670d38c43c6ea5adff

Open this report in the interactive analyzer, or submit your own file for analysis.