Malicious PDF — malware analysis report

Static analysis result for SHA-256 b316e0d93ab75c6c…

MALICIOUS

PDF

40.6 KB Created: 2020-08-21 22:23:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 84f70ccdf2f9a903d5e6e49116d08f5d SHA-1: f65be194891b104489dc767fd7c23e805771cb19 SHA-256: b316e0d93ab75c6c4195ea319597baa8a6be52b54a96ab8305ca77eb05b1bc00
194 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to `https://ttraff.ru/pify?keyword=best+screen+recorder+for+pc+free`. This URL is embedded within the document body, suggesting a lure to trick users into visiting a potentially harmful site. The file also exhibits characteristics of a link farm, with numerous external PDF links, many hosted on Shopify. The primary intent appears to be directing users to malicious infrastructure under the guise of providing software information.

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=best+screen+recorder+for+pc+free In PDF document text
    • http://xezegova.heritagegspkennels.com/uploads/1/3/0/8/130814328/jatumala_punodiwopazoru_watezavuxa.pdfIn PDF document text
    • http://belidikal.derekdbass.com/uploads/1/3/1/0/131070450/judukapurelivu.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/1/0433/7513/2824/files/82835091548.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5344/8358/files/fujoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0334/6078/files/vatican_guided_tour_length.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2908/6876/files/54323661228.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0470/6464/files/31912445851.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/87872229934.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0389/6230/files/63538199641.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2998/7489/files/refetulajevig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2545/7574/files/77566862381.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7645/9422/files/fonunewakexavekew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5188/4449/files/ranulu.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_off0000618a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x618A 4956 bytes
SHA-256: 992226ca36f6e19e0969ea5a5753090f3010f5090498d810cf4761ef1935e224
font_01_sfnt_off00007275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7275 10496 bytes
SHA-256: 4b1237bbfa0f115b3a7477f96b5e708be33faf422047fb3ca764fec5240a2643

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