Malicious PDF — malware analysis report

Static analysis result for SHA-256 c096096641522741…

MALICIOUS

PDF

48.9 KB Created: 2020-08-31 14:23:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e33505354866203eadb10ae39003477d SHA-1: b29cc6cbb786c8173b66de80d1374adb7ef61967 SHA-256: c0960966415227415b9c637376d0ff27423f16bcf6d7aee5df562bfdd70dd1ba
154 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to malicious infrastructure. Additionally, PDF_SEO_LINK_FARM suggests a mass of external links, likely for SEO manipulation or to distribute further payloads. The embedded URL https://ttraff.com/pify?keyword=contemplated+example+sentences is identified as a malicious redirector. No scripts were extracted from this sample.

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=contemplated+example+sentences
    • https://static.usrfiles.com/ugd/b8c837_5eec4bbe028b4a24be489570cf5eb964.pdf
    • https://static.usrfiles.com/ugd/4b68be_6f457f4232114f2ab5dd00f95ed0c9d7.pdf
    • https://static.usrfiles.com/ugd/dd4472_c0631935f1ca4190adcb17b6344a3ba9.pdf
    • https://static.usrfiles.com/ugd/dc98cc_d446d72dee094a5fa9f208a139b699b9.pdf
    • https://static.usrfiles.com/ugd/9757e7_6c5ac7d4c7c04df9bf2e67ee393928ad.pdf
    • https://cdn.shopify.com/s/files/1/0433/1290/6405/files/vubikenusodarofiluvabep.pdf
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/liroleturuwuxizerewag.pdf
    • https://cdn.shopify.com/s/files/1/0446/8968/6681/files/adobe_flash_player_android.pdf
    • https://cdn.shopify.com/s/files/1/0433/7329/7822/files/saxigugumosole.pdf
    • https://cdn.shopify.com/s/files/1/0440/1322/4094/files/fusuxagezobi.pdf
    • https://cdn.shopify.com/s/files/1/0436/3842/3710/files/brat_diet_foods.pdf
    • https://cdn.shopify.com/s/files/1/0432/0981/8274/files/98042853061.pdf
    • https://cdn.shopify.com/s/files/1/0432/8819/9332/files/mejoritirimiputoxejugodun.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008234.bin
1154adc49bb45d07362a1ac2bcc98c650e4acb395bba707057e6ef23c4d2c55f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8234 5096 bytes
font_01_sfnt_off00009373.bin
7905d6d86de8aefdf0508709304ff397f3575686bfeeb87acbe4bdf89b573837
pdf-font-stream PDF embedded font (sfnt) at offset 0x9373 10312 bytes