Malicious PDF — malware analysis report

Static analysis result for SHA-256 a96bbc4a93b7cf3f…

MALICIOUS

PDF

51.1 KB Created: 2020-07-24 16:57:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-07
MD5: 8ba3194889c43c847edb34d4176b9eb5 SHA-1: 2518be761a0d83405e5a00a1dfc2c639c1fa3afa SHA-256: a96bbc4a93b7cf3f36570a790355dd14e6eb3b21291c62b6438b575c467aa39f
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link redirects to a known malicious URL. This indicates a social engineering attempt to drive traffic to malicious infrastructure, likely for further exploitation or phishing. The document body, though heavily obfuscated, suggests a lure related to programming resources.

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=all%20data%20structure%20programs%20in%20c%20pdf In PDF document text
    • http://files.thetapstudioak.com/uploads/1/3/0/8/130874488/tubugifonetiwuvifed.pdfIn PDF document text
    • http://files.grettawilson.com/uploads/1/3/1/4/131437351/5306487.pdfIn PDF document text
    • http://files.salt-kitchen-co.com/uploads/1/3/1/6/131637402/9947709.pdfIn PDF document text
    • http://files.peakelectricbikes.com/uploads/1/3/1/4/131438114/fotop.pdfIn PDF document text
    • http://files.viewourbenefits.com/uploads/1/3/2/7/132741029/3a71c812.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/1/0433/7949/0968/files/kuzonakexojiwogiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2639/0933/files/21394615735.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8991/2218/files/79605200985.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6026/5117/files/10868489531.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1034/2564/files/24405853915.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4421/6730/files/26555590471.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2906/1014/files/45314536889.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0154/4863/files/63381931883.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fejatomamegebuwugibuvu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7573/9560/files/52569299959.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0527/0427/files/xowejefopuve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5428/5479/files/pigafedezavoke.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_off00007ea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EA3 5344 bytes
SHA-256: b295f5b3987088b9fde0a157bb5baa6e934b62d90adf576a60b556d044b5236f
font_01_sfnt_off000090b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90B2 14740 bytes
SHA-256: 4fb79bec26ab0aea5ddd80e04bee95935a2df86aab6df215c8a3665cdf12cbf1

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