Malicious PDF — malware analysis report

Static analysis result for SHA-256 87ed1cf0572f2bc2…

MALICIOUS

PDF

55.8 KB Created: 2020-07-12 17:58:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 4903b3ffb060f4904c714138f642cc8f SHA-1: 3af717e1395b7d74f2e7892ca1c440c5335fc72f SHA-256: 87ed1cf0572f2bc2885bec35e0d97bb89778fa279592bc0f0c413e454a136991
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to redirector infrastructure. The primary redirector URL is https://ttraff.com/wb?keyword=1001%20nights%20story%20pdf, which is flagged as malicious. The document body, though heavily obfuscated, contains references to this URL and other PDF links, suggesting a link farm or phishing attempt disguised as a story 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/wb?keyword=1001%20nights%20story%20pdf In PDF document text
    • http://files.heartsofhorsehaven.org/uploads/1/3/2/6/132681916/jawuderuniwalu_duliguxa.pdfIn PDF document text
    • http://files.madlyeclectic.com/uploads/1/3/1/4/131483253/nuwitoduku_xafozovininu_lekilirox_navagad.pdfIn PDF document text
    • http://files.lm2go.com/uploads/1/3/1/8/131856713/5486656.pdfIn PDF document text
    • http://files.mectacprinstructor.com/uploads/1/3/1/4/131437740/2f469132278.pdfIn PDF document text
    • http://files.casaofcentraloregon.org/uploads/1/3/1/1/131164398/8127608.pdfIn PDF document text
    • http://files.jamesedwardhughes.com/uploads/1/3/0/8/130814387/5962757.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fodibak.files.wordpress.com/2020/07/36924369384.pdfIn PDF document text
    • https://zodizijemas.files.wordpress.com/2020/06/rezatoludoreledama.pdfIn PDF document text
    • https://bujavam.files.wordpress.com/2020/06/vavanokibofobibubupokisur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38664456414.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1358/6596/files/dutavubakukewamukevagiba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1740/4573/files/49133996835.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kevesuladufutaniwor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zimupumunilojoduwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3866/2053/files/8789435001.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/17612659915.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87294954422.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5937/2439/files/88057795610.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_off00009de9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DE9 4932 bytes
SHA-256: a3d6a60e1ae0085bc832ed93570187936ed651307196eb4fe81039c395328031
font_01_sfnt_off0000aea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEA4 10632 bytes
SHA-256: 9489a87654dc7a54de3d4da567636e6b6ad490f9402dc179617a80c38aa9875b

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