Malicious PDF — malware analysis report

Static analysis result for SHA-256 32a6c318bd5b607a…

MALICIOUS

PDF

47.6 KB Created: 2020-07-19 00:50:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 9aa1d4ea0c8a0bda84fbb798224472ee SHA-1: 3c19d4857c210661430e50ce35cb987ee1a48606 SHA-256: 32a6c318bd5b607a0214d828b37f3e1fccb1c268d740f9a06a014c4904ddba16
194 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by multiple heuristics, including a critical finding for a malicious redirector link and a PDF link farm. The document body, though heavily obfuscated, suggests a lure related to 'Entity framework tutorial c'. The primary malicious IOC is the redirector URL, which likely leads to further malicious content. The presence of numerous external links indicates an attempt at SEO manipulation and traffic generation to malicious sites.

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=entity%20framework%20tutorial%20c#%20step%20by%20step%20pdf In PDF document text
    • http://files.tcrinnovations.com/uploads/1/3/0/7/130738484/fb5a54.pdfIn PDF document text
    • http://files.barbarajbecker.com/uploads/1/3/0/8/130813362/5622055.pdfIn PDF document text
    • http://files.learning4development.org/uploads/1/3/1/4/131407571/zusujate.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://litilazer.files.wordpress.com/2020/07/83787424205.pdfIn PDF document text
    • https://ranosadimo.files.wordpress.com/2020/07/vifoxosotenokabig.pdfIn PDF document text
    • https://kopeboxapum.files.wordpress.com/2020/06/18536381291.pdfIn PDF document text
    • https://tuxulaz.files.wordpress.com/2020/07/78606988358.pdfIn PDF document text
    • https://legebepome.files.wordpress.com/2020/06/sulazarepomodenajuku.pdfIn PDF document text
    • https://gimanuzil.files.wordpress.com/2020/07/wemewodeburi.pdfIn PDF document text
    • https://xepodifi.files.wordpress.com/2020/07/bigizozetusagegaj.pdfIn PDF document text
    • https://sedibim.files.wordpress.com/2020/06/lujuvegexekabagovokuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1616/7328/files/56648414905.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9703/8756/files/gunajuruga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0268/2789/files/tilimeza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7667/3946/files/65158978508.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6063/3504/files/kisijalofebesimix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25618010541.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3169/1421/files/bomakirutexoririrojupoxix.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 6

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_off000072c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72C3 4948 bytes
SHA-256: edc1c3dcd7d90ac1a7e6cf6016a58d8f40e05e6e59b00de08745a5845e03f2bd
font_01_sfnt_off00008398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8398 14656 bytes
SHA-256: f9b4b362408339415800fa0245c1b8f19d37140ee611615f43d0f19c92a77a00

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