Malicious PDF — malware analysis report

Static analysis result for SHA-256 318c3a06e63f24f2…

MALICIOUS

PDF

43.9 KB Created: 2020-08-31 09:07:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: da39a4dcdbda80d02c4d8bf7fdcf1905 SHA-1: b3731aefd4b69854644767bceb67a030a0ca22d7 SHA-256: 318c3a06e63f24f29a75dd13592050210f41673a2d880a1751f2cfa453478d23
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, https://ttraff.ru/wix?keyword=alaskan+storm+free+download, which is presented as a free download. The document body also contains this URL and numerous other links to PDF files hosted on various domains, suggesting a link farm or redirection strategy. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is designed to lead users to harmful 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.ru/wix?keyword=alaskan+storm+free+download In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/2f07a1_54820499ff3b442b9dc2e1e8bee54648.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/fd3290_30a89ea8ed0f4099b82874fe192d83d5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1a89c8_c795401d15da46d48d913b9b1c4280d2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_9e6b8844d98247528f9cf891eecaea00.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ce0e6d_9a6a26fb89a6410f90ee9ed05e2f6d4c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_dbd9e75d778640b4b357b5f909b12d62.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6576/1176/files/kuguk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3334/6719/files/notufu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3754/7929/files/97789101024.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1011/2163/files/head_first_design_patterns_book_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0976/7584/files/53346619023.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3060/0090/files/movies_hd_1080p_bollywood.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0467/3699/files/bruner_toward_a_theory_of_instruction.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59DA 4852 bytes
SHA-256: 4cb8d2f619af232d43b07e7bb20c963f710c4a9bcdf1f043dccef77bfb45f3c5
font_01_sfnt_off00006adb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ADB 5196 bytes
SHA-256: 88b6bb57882c5cb3a824854cae8f2a6827cc12a0bed1cf5166399b93d56b8fcf
font_02_sfnt_off00007c81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C81 11352 bytes
SHA-256: e33e39b350a5554e97c47fee1943ae0434cdccff1c1180dfcf2c249b2ca05c24

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