Malicious PDF — malware analysis report

Static analysis result for SHA-256 68ec3675a731a905…

MALICIOUS

PDF

66.1 KB Created: 2020-07-24 15:25:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 7d203477016274bb687401129a29282b SHA-1: cc15740d9bf77eb9a085e41ac93abeaaf77ae42f SHA-256: 68ec3675a731a9052484309daa06ea9b98b3603bba1d90dbaa1d9171e60fdc71
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service (ttraff.ru) which is flagged as malicious. The document body, though heavily obfuscated, suggests a lure related to 'cirugia laparoscopica urologia pdf'. The presence of many SEO-optimized PDF links indicates an attempt to drive traffic through a link farm, likely for phishing or malware distribution. No scripts were extracted, but the malicious redirector and link farm structure are strong indicators of malicious intent.

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=cirugia%20laparoscopica%20urologia%20pdf In PDF document text
    • http://files.dashpac.com/uploads/1/3/1/6/131607321/napopowo.pdfIn PDF document text
    • http://files.bridgendrailwayclub.co.uk/uploads/1/3/1/4/131437535/tuzelifinaz.pdfIn PDF document text
    • http://files.eurojpconsulting.com/uploads/1/3/0/8/130873807/patukivu.pdfIn PDF document text
    • http://files.martapequeno.com/uploads/1/3/0/9/130969775/1971468.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/1/0433/0687/7080/files/78214852322.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4018/7303/files/98255103374.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4734/5573/files/18873583198.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3108/4708/files/45994693208.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/lorirepomilisefeko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2318/7614/files/79671892418.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fikikotiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2861/9168/files/rogokudumeve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3729/4741/files/99925126441.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3629/5836/files/sulasobir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8561/0654/files/vutufotov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3580/4319/files/25732602769.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8421/8532/files/dugafujajokesumosijevadal.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 5

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_off0000c500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC500 4924 bytes
SHA-256: b5ec34d99f5e64496f76dbf6c2422c4471517d6d857964a678260a7f820473a7
font_01_sfnt_off0000d5ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5CA 10968 bytes
SHA-256: 3a1df95be189f79278abc06fba04766e4dc8694d4b9b42a3cd48f7ab92b003bc

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