Malicious PDF — malware analysis report

Static analysis result for SHA-256 10ee781309fc79e6…

MALICIOUS

PDF

49.8 KB Created: 2020-07-23 08:30:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: a8aa87122524a42e8f3ef219325725a2 SHA-1: e595996d21aad5d3d950b74e0979be138ad166f5 SHA-256: 10ee781309fc79e6f7e6634b964d6a79e2fb272a6a863559ce6836771ebd2e18
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded links that redirect to known malicious infrastructure, specifically identified as a redirector for SEO-based phishing. The document body, though heavily obfuscated, suggests a lure related to medical information, likely to trick users into clicking the malicious link. The ML classifier strongly indicates malicious intent, and the presence of multiple external PDF links further supports a campaign to distribute malicious content.

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=tipos%20de%20dolor%20abdominal%20semiologia%20pdf In PDF document text
    • http://files.cobilconnect.com/uploads/1/3/0/9/130969853/6ea8d66a.pdfIn PDF document text
    • http://files.shopfybr.com/uploads/1/3/0/9/130969082/9dc852ba008251.pdfIn PDF document text
    • http://files.nicholasvicknairdesigns.com/uploads/1/3/1/4/131438528/d454f.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/1/0430/9195/1769/files/buzilefawozukoze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sivuduveserekolagaxabulux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8759/3632/files/50435207446.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8334/2748/files/lexitolemepol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2041/1289/files/tewelaretevamefemaripo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99913566500.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7249/5524/files/zarezupadibu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9635/0624/files/53837289488.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9336/7710/files/wapuvepikobamimuliwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4995/1140/files/92112308864.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8750/4294/files/miwomavix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0582/1599/files/zumojuderobalow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1800/2340/files/97084154128.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vibamiwa.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_off000086e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86E2 5156 bytes
SHA-256: b2e4056a5c25f19de3d525665dc3f640c011488d2e8e7ef67fa949c8ecac1c0f
font_01_sfnt_off0000983c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x983C 9808 bytes
SHA-256: ca21370e841a22fe694f1526f99744bde5e3487cfaec8678393a4527598d697d

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