Malicious PDF — malware analysis report

Static analysis result for SHA-256 5211edc83d1b57bd…

MALICIOUS

PDF

52.2 KB Created: 2020-07-22 11:45:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 43fabd5c804796509ae3db8238a05ca7 SHA-1: f7a12a9506bdb617cc32f5b31b19b207f7902baa SHA-256: 5211edc83d1b57bd597d2255515ac1bcc3f8da06887252ae85556e221b25eac8
194 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, appears to be related to a workstation datasheet, suggesting a lure to trick users into clicking the malicious link. The primary malicious IOC is the ttraff.ru URL, which is confirmed to redirect to malicious infrastructure.

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/wb?keyword=hp%20z840%20workstation%20datasheet%20pdf In PDF document text
    • http://files.aloenottingham.com/uploads/1/3/1/6/131637168/murulalirovotefexise.pdfIn PDF document text
    • http://files.millbrookrotarydirectory.com/uploads/1/3/0/7/130775846/d99ea.pdfIn PDF document text
    • http://files.chillnbeans.com/uploads/1/3/1/1/131164152/tirowujuja.pdfIn PDF document text
    • http://files.sprocket-theatre.com/uploads/1/3/1/4/131482944/89b084f.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/1/0428/9835/8432/files/zemeletitofugawekabol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2019/7789/files/jumixawugixulemunuwixigo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3506/4480/files/53813497287.pdfIn PDF document text
    • https://pemifuxo.files.wordpress.com/2020/07/razonerine.pdfIn PDF document text
    • https://puponiwil.files.wordpress.com/2020/06/zububatadubosuw.pdfIn PDF document text
    • https://nubudin.files.wordpress.com/2020/06/tiruwumudadiretujurew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78539107281.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9105/0137/files/pulemewupewiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7574/7484/files/biwikezodokoxiriruk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2670/0696/files/tolarijosiwavuzudum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74098669839.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7005/4805/files/waguxebuzepajuvigudepet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/bimetivos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4492/8674/files/xogovuvoveponixo.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 8

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_off00008165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8165 5476 bytes
SHA-256: 47a06eca46ba75bf279ac87aba119511cd147f911514b99f4de11bcb0feb705d
font_01_sfnt_off0000940d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x940D 15080 bytes
SHA-256: 94bf16a5341bb426d2c8abd1b95ee5bda63332c056ee9dd7274a98af7fe9de55

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