Malicious PDF — malware analysis report

Static analysis result for SHA-256 1adf4aedb31020af…

MALICIOUS

PDF

48.0 KB Created: 2020-08-21 18:27:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4284c1d179e25824ee2dce7f34c54e81 SHA-1: f21ff9d4d90fb57faec6f0454c64ceb1d638dd44 SHA-256: 1adf4aedb31020afa0d7399b22470ecfeebbc4b2f1f6b34357599b529d722135
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'free brain games apps for android' and the malicious URL. This suggests a social engineering tactic to trick users into clicking the link, which then likely redirects to malicious content. The PDF also contains a large number of external links, indicating a link farm strategy.

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/pify?keyword=free+brain+games+apps+for+android In PDF document text
    • http://nabetu.inspirationstudiosgallery.com/uploads/1/3/1/4/131453293/ca28d2c61c43.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/1/0431/6777/6919/files/94192809194.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6840/5413/files/jofololejunotamisav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/strategic_marketing_plan_excel_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6686/7362/files/simple_present_tense_affirmative_negative_interrogative_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7194/7423/files/85861199606.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7279/6310/files/31230583375.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4539/5359/files/black_s_law_dictionary_online_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8734/0454/files/44353103858.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5922/4480/files/lelomiworevukubonij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9949/4302/files/cbse_maths_textbook_for_class_10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2594/8072/files/gebawavopepib.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 1

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_off00007dfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DFA 5424 bytes
SHA-256: 670a4520fcf8b262b28322549daeed6fcfb873ccc3251d32947c9e4c5dc6a4dd
font_01_sfnt_off00009049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9049 10132 bytes
SHA-256: 543b84b841880758c5b34b16cd01aca8d5c4bf45b5cdb7266b1e7587adc9736f

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