Malicious PDF — malware analysis report

Static analysis result for SHA-256 af84fed18df362e1…

MALICIOUS

PDF

55.8 KB Created: 2020-08-10 10:55:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f07082735fae846936174e105a8c41a1 SHA-1: b3ee3febb614bd55d48173f8a2ae4ebf79ecfa31 SHA-256: af84fed18df362e10294b80df3ab5550126f4b63182f399e483332a755786fae
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, with one identified as a known malicious redirector. The ML classifier also flagged this PDF as malicious with high confidence. The document body, though obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=zarathustra+avesta+pdf' which is likely used to redirect users to malicious content. The presence of numerous links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute malicious content.

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.cc/pify?keyword=zarathustra+avesta+pdf
    • http://files.peaceseedslive.com/uploads/1/3/1/4/131452858/zerabirovezufedomogo.pdf
    • http://files.ldsnest.com/uploads/1/3/0/8/130874148/8604383.pdf
    • http://files.footlightstheater.com/uploads/1/3/0/8/130813948/ed103.pdf
    • http://files.baysidewestbay.co.uk/uploads/1/3/1/6/131637553/384184.pdf
    • https://cdn.shopify.com/s/files/1/0431/8530/7810/files/rowajawomok.pdf
    • https://cdn.shopify.com/s/files/1/0430/3365/7507/files/nazakivumedati.pdf
    • https://cdn.shopify.com/s/files/1/0427/6341/9815/files/3199588584.pdf
    • https://cdn.shopify.com/s/files/1/0432/5670/9288/files/76629714634.pdf
    • https://cdn.shopify.com/s/files/1/0431/0496/0676/files/24441281018.pdf
    • https://cdn.shopify.com/s/files/1/0441/2211/2152/files/the_dictionary_of_body_language_joe_navarro_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/6190/3517/files/masigofimofikave.pdf
    • https://cdn.shopify.com/s/files/1/0451/8307/4455/files/furujimosenopoxal.pdf
    • https://cdn.shopify.com/s/files/1/0428/5222/1091/files/tizinomirasorupogosulakub.pdf
    • https://cdn.shopify.com/s/files/1/0430/3192/0794/files/solve_exponential_equations.pdf
    • https://cdn.shopify.com/s/files/1/0430/9788/2773/files/69115013141.pdf
    • https://cdn.shopify.com/s/files/1/0444/8036/4711/files/12281639627.pdf
    • https://cdn.shopify.com/s/files/1/0432/4445/4051/files/zorigopogerubudojubuje.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_off00009b13.bin
3d769d9fee06ba37fd880878e4d7ef0e793c04e736d92f97b3a8d387765b45cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B13 5116 bytes
font_01_sfnt_off0000ac7f.bin
2a787a28a9dae180b7b5979d3cb6078e602ee04182831c48348b5b9fbf6be657		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC7F 11484 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.