Malicious PDF — malware analysis report

Static analysis result for SHA-256 adb90bc813119362…

MALICIOUS

PDF

34.1 KB Created: 2020-08-22 20:02:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 62cb0e8d806179c235d8d2fc7f947739 SHA-1: 4b783bf7417ab41b851eff3f9e6415d4a86695df SHA-256: adb90bc81311936285f6c029e681b5fa215bab9c580c9526bf1f1b2d7a421e2d
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a malicious redirector link, and another identified a link farm structure. The document body contains text related to software downloads, suggesting a lure to trick users into clicking these links. The primary redirector URL is https://ttraff.cc/pify?keyword=hungry+shark+evolution++uptodown, which likely leads to further 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=hungry+shark+evolution++uptodown In PDF document text
    • http://files.nataliebritecoaching.com/uploads/1/3/0/8/130814245/6ec0e.pdfIn PDF document text
    • http://files.teenconcussion.com/uploads/1/3/0/9/130969140/kinenupere_bigewoz_jesafifavum.pdfIn PDF document text
    • http://files.rcprayertabernacle.com/uploads/1/3/1/4/131406060/20238618f6c1.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/1/0431/6997/2384/files/jikuzasijifukebadat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7482/9987/files/annotates_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1327/5811/files/android_ordner_mit_pc_synchronisieren.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9814/2875/files/buchungsbesttigung_vorlage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0858/7936/files/english_grammar_learning_in_tamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/33078626275.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3055/9390/files/cgst_bare_act.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0819/5738/files/tx_annotation_driven.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4674/7803/files/numakoxalapejaluzonagug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3246/8890/files/4555047688.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3031/4151/files/62586958085.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 3

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_off0000495b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x495B 5500 bytes
SHA-256: 1996c3123222d7c4118d1b856a9ac0394b89f51005dea1c6bc4f961562670a07
font_01_sfnt_off00005c19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C19 9428 bytes
SHA-256: a4489926b8058ae7f7b6e6313a037a0bb9f54ea4ef98263e5d078d5379105d69

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