Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d8bd01ab411b88b…

MALICIOUS

PDF

45.5 KB Created: 2020-07-16 23:42:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: c41d43a381eb606e813692f4ca3e2e9e SHA-1: c91441d130822f0f46615aab76351b342d94470c SHA-256: 1d8bd01ab411b88bca51e4de2b2de43ad2ea06e00a152f64ebab7456bff38577
194 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The primary malicious URL identified is https://ttraff.ru/wb?keyword=apics%20supply%20chain%20pdf, which is likely used to redirect users to further malicious content. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the extensive linking strongly suggests a distribution or phishing attempt.

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=apics%20supply%20chain%20pdf In PDF document text
    • http://files.alswinners.com/uploads/1/3/1/3/131379085/zerasu_zesori_xuvozanov_gotazidoxe.pdfIn PDF document text
    • http://files.berlangadentures.com/uploads/1/3/0/8/130873795/papusowe_buraruteruluruj_zigegafoxuw.pdfIn PDF document text
    • http://files.danpollockthrillers.com/uploads/1/3/1/6/131606268/xonujenovadidog.pdfIn PDF document text
    • http://files.opendoorsspokane.com/uploads/1/3/1/8/131858540/8438683.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://zigonasoxovu.files.wordpress.com/2020/06/tapog.pdfIn PDF document text
    • https://zamawije.files.wordpress.com/2020/06/sekadozo.pdfIn PDF document text
    • https://diwegola.files.wordpress.com/2020/07/89297027048.pdfIn PDF document text
    • https://zorevuz.files.wordpress.com/2020/07/35088990310.pdfIn PDF document text
    • https://gozulij.files.wordpress.com/2020/07/daminujutadatanufimawolu.pdfIn PDF document text
    • https://wupobififid.files.wordpress.com/2020/07/68836162447.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0439/4661/files/rafokasuremozuvir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1952/5531/files/61152632185.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2205/6600/files/vavikotisavawomebaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/36867196358.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7994/9718/files/lukesuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3321/5654/files/33229395764.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3215/8116/files/99320718436.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/giratajolexodomofavewolov.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 3

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_off0000736e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x736E 4812 bytes
SHA-256: 9d7e85b00747cf64192a63644caedc3a681d0b136fff34dd5d9a17067ba5db1e
font_01_sfnt_off000083b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83B7 11104 bytes
SHA-256: 688589caf9cc4d3f57ccca9c07d3ab7ce694937e09e2bd78e725d9769abb68df

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