Malicious PDF — malware analysis report

Static analysis result for SHA-256 d19d4d97c83ab1e5…

MALICIOUS

PDF

40.3 KB Created: 2020-07-08 23:52:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-07
MD5: 375c6061d0cd5257561a1218fc88d1fa SHA-1: 6907501870deda3b4697f364028a56aca07bd1c1 SHA-256: d19d4d97c83ab1e55a077a220c751c65d02d143ca188901adf95058d03d22adc
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags a link to 'ttraff.cc', indicating a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, while containing garbled text, includes the URL https://ttraff.cc/wb?keyword=antecedentes%20del%20derecho%20civil%20en%20mexico%20pdf, suggesting a lure to a malicious site disguised as a PDF download.

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.cc/wb?keyword=antecedentes%20del%20derecho%20civil%20en%20mexico%20pdf In PDF document text
    • http://files.morganboardman.com/uploads/1/3/2/6/132681245/ruvazabesogi.pdfIn PDF document text
    • http://files.wisdomsfountain.com/uploads/1/3/1/0/131070911/928f47b.pdfIn PDF document text
    • http://files.gulnurozdaglar.com/uploads/1/3/2/3/132302913/38e83.pdfIn PDF document text
    • http://files.upwardfacinglife.com/uploads/1/3/1/4/131436971/velolerulamur_baxafijirun.pdfIn PDF document text
    • http://files.alexboel.com/uploads/1/3/1/0/131071035/046f8078f6fb.pdfIn PDF document text
    • http://files.connoisseurstours.com/uploads/1/3/1/8/131857071/abaa266e7dc9a.pdfIn PDF document text
    • http://files.hullabaloomusicfestival.com/uploads/1/3/2/7/132740415/zikomigop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://lexaxawo.files.wordpress.com/2020/06/76447534094.pdfIn PDF document text
    • https://bulijedakuve.files.wordpress.com/2020/06/37401022300.pdfIn PDF document text
    • https://bavorekivaso.files.wordpress.com/2020/06/49040199682.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/norojakibi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89462818099.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63529720688.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87899810879.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99237037604.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48695811849.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_off0000619c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x619C 5088 bytes
SHA-256: 65562eb5bb69ad45998360a096745dc7e7f68f62e38e5181f50f50b09108eaf0
font_01_sfnt_off000072bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72BC 10284 bytes
SHA-256: 0823e316a4537a2d40ecb7b46db0d43e8ce666d128086a4bcd77237eef5470d2

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