Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ebc7def2a5d6da4…

MALICIOUS

PDF

40.6 KB Created: 2020-08-16 13:10:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4892a7916cd304f552895fcacc858b53 SHA-1: f9ba4778990b7e0ebeb969062cbe84506fea5ba6 SHA-256: 5ebc7def2a5d6da4564514a5b9c3f80354bdd4a434ac3b7cef7f2b3e6ddccbb8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains embedded URLs that point to a known malicious redirector, indicating an attempt to lead users to harmful content. The document body, though heavily obfuscated, includes text related to 'business security services' and the malicious URL, suggesting a phishing or scam lure. The presence of numerous external PDF links also suggests a link farm or SEO manipulation tactic, likely to obscure the primary malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/pify?keyword=worry-+free+business+security+services
    • http://tiragega.goodnews4thecounty.com/uploads/1/3/1/0/131070374/ripemigofanagarexo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0679/5686/files/protein_tertiary_structure.pdf
    • https://cdn.shopify.com/s/files/1/0431/0623/8626/files/super_smash_flash_2_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/0733/6857/files/95478928994.pdf
    • https://cdn.shopify.com/s/files/1/0435/0004/4454/files/fiery_furnace_arches_guided_tour.pdf
    • https://cdn.shopify.com/s/files/1/0438/9833/9496/files/19372566115.pdf
    • https://cdn.shopify.com/s/files/1/0433/9548/1754/files/kathy_scruggs_reporter_died.pdf
    • https://cdn.shopify.com/s/files/1/0433/2922/4857/files/95823568371.pdf
    • https://cdn.shopify.com/s/files/1/0433/1523/2921/files/fufoturubewaxedom.pdf
    • https://cdn.shopify.com/s/files/1/0433/6694/0828/files/battleships_movie_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/2839/7728/files/93595963543.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061f2.bin
887986b76335fe40d498d981992a608462725ccb636bfc3cd4d8c4d96a7e16ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x61F2 4980 bytes
font_01_sfnt_off00007318.bin
4b6c6ca7f4b720436143232413aad7cea4d3f41aff2902e5332a2b0d1686814a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7318 10216 bytes