Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cd2050ecc24b4ea…

MALICIOUS

PDF

46.7 KB Created: 2020-08-21 13:19:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5c18181aeb31887bc006bd543c81d046 SHA-1: 18bd0337af0a3718cd0672d2087049901e9f9d65 SHA-256: 7cd2050ecc24b4eadea1b78ed763fea65925d861575d7d99626ad0da79b2d965
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one to a known malicious redirector, disguised as a 'classifying shapes worksheet'. This suggests a phishing or SEO poisoning tactic to drive traffic to malicious sites. The ML classifier strongly indicates malicious intent, and the presence of embedded URLs points towards a redirection scheme.

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.ru/pify?keyword=classifying+shapes+worksheet+3rd+grade In PDF document text
    • http://files.leasidearena.com/uploads/1/3/1/4/131455832/sowapinosivomoje.pdfIn PDF document text
    • http://sugudate.nyheart.net/uploads/1/3/0/8/130874254/baniwuna.pdfIn PDF document text
    • http://bisola.mucusless-diet.com/uploads/1/3/2/7/132712572/kisebibibixibu.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/1/0427/6623/7852/files/handbook_of_utility_theory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6617/9230/files/27991118217.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4823/8241/files/zisovatodekegodol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3383/7224/files/avery_business_card_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9672/7962/files/english_language_curriculum_guide_2017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6026/4086/files/81874343255.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3027/3448/files/gogonejopekasudufi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1162/1543/files/37219018591.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5265/5004/files/ad_d_monster_manual_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9911/2099/files/41349440409.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7873/0403/files/business_plan_pizza_restaurant.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C5 5632 bytes
SHA-256: d750ea6ea8fb76047e2818baf724db5a9383083a02ce3ae78494d4a8d02a11ce
font_01_sfnt_off000075f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75F7 10024 bytes
SHA-256: 282184335818ab1f2eec3c1f688d12ca387d2d25f01bf072156cd84084e32821
font_02_sfnt_off00009888.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9888 16116 bytes
SHA-256: 586fd2d47d7ef655ac8fcedaf3a17ac43b55ee34544d24df6525aba8b365c669

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