Malicious PDF — malware analysis report

Static analysis result for SHA-256 34df3ba35a0c1f2c…

MALICIOUS

PDF

54.7 KB Created: 2020-07-11 22:26:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: b97679ad6b19793204ecaf8965efb502 SHA-1: 69e0830a32a081802ac901a796e1c4702ad33cb3 SHA-256: 34df3ba35a0c1f2ca1624a9557a21c9f4f87957282fd462ee04db349c6a11ec1
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'soccer warm ups' and the malicious URL, suggesting a lure to trick users into clicking through to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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.com/wb?keyword=soccer%20warm%20ups%20pdf In PDF document text
    • http://files.oceanorganicscafe.com/uploads/1/3/2/3/132302892/wowen.pdfIn PDF document text
    • http://files.katrinarecoveryquilts.org/uploads/1/3/0/7/130739318/suruxakare.pdfIn PDF document text
    • http://files.ericrolon.com/uploads/1/3/2/8/132814364/faxej.pdfIn PDF document text
    • http://files.devonunwin.com/uploads/1/3/2/3/132303219/c6c413.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://jugafifider.files.wordpress.com/2020/07/93666816890.pdfIn PDF document text
    • https://fakadepe.files.wordpress.com/2020/07/76941471642.pdfIn PDF document text
    • https://xokiwija.files.wordpress.com/2020/06/90278614843.pdfIn PDF document text
    • https://fovomunadaj.files.wordpress.com/2020/07/kenipamebozodidefemenudu.pdfIn PDF document text
    • https://devozepapake.files.wordpress.com/2020/07/kosozofevijepewesepid.pdfIn PDF document text
    • https://sudatitilu993877526.files.wordpress.com/2020/07/54843839149.pdfIn PDF document text
    • https://zonaselid117862540.files.wordpress.com/2020/06/67039563781.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/3229/0215/files/tedavima.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8542/2997/files/lanumolusironubi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98690712505.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99914628395.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8032/7076/files/70994670129.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41697505155.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67279733654.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9070/6589/files/lofazirunezazejuso.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 7

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_off00009a02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A02 5112 bytes
SHA-256: 933475f24b2f862990837b1e3e5a01928fafa3ef7385c9ded49765c53c353139
font_01_sfnt_off0000ab5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB5D 10044 bytes
SHA-256: b653b3221aba97e2ccf983225a539ee76933e3758bc65cdb947b62012b09dc93

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