Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ccdc962fcffb67b…

MALICIOUS

PDF

41.8 KB Created: 2020-08-14 18:00:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46241ad6e9eff306183bb496aedf4ed3 SHA-1: c0ba0b613cd7232fa4a5bb04b769b4d47600a315 SHA-256: 6ccdc962fcffb67b116d67042915f0a59192e2ac49777380c9c76fea210546ed
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=asura+bgm+song++starmusiq, which is likely intended to trick the user into clicking it. The PDF also contains a large number of links to other PDFs, suggesting a link farm or SEO manipulation tactic.

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.com/pify?keyword=asura+bgm+song++starmusiq
    • http://files.indigenouspoliticalauthority.org/uploads/1/3/1/0/131070325/6629860.pdf
    • http://files.woorisf.com/uploads/1/3/0/7/130738512/nasumubop.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/3506/5510/files/carcel_de_amor.pdf
    • https://cdn.shopify.com/s/files/1/0431/7852/4832/files/puperomovalagutatetorabol.pdf
    • https://cdn.shopify.com/s/files/1/0432/0906/4607/files/essential_oils_list_and_benefits.pdf
    • https://cdn.shopify.com/s/files/1/0433/0238/7867/files/madiravisokesapopu.pdf
    • https://cdn.shopify.com/s/files/1/0427/9464/7719/files/pinixizodadunudokugiwevi.pdf
    • https://cdn.shopify.com/s/files/1/0437/4921/2311/files/99871720686.pdf
    • https://cdn.shopify.com/s/files/1/0432/7417/4622/files/madukaziludima.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jedufejaselikaruratemop.pdf
    • https://cdn.shopify.com/s/files/1/0434/6275/4461/files/keepers_of_the_kalachakra_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/4243/0362/files/46656123924.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000047bc.bin
048fb1891f432488516cd811e7b04d68e7d39e548ca3495625137f8fb0c23ff4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47BC 6744 bytes
font_01_sfnt_off000058a1.bin
acc42015a7404ca3f1c070f597ae6ee746f22fd161e1288240b83ab9895f2e46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58A1 5228 bytes
font_02_sfnt_off00006a49.bin
b139e024fc8c65f1be2cd02109e3d933024ca3581c05fd57d1fbb601a4437476		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A49 14908 bytes

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