Malicious PDF — malware analysis report

Static analysis result for SHA-256 0956396c1760f331…

MALICIOUS

PDF

39.3 KB Created: 2020-08-11 20:27:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3f9fb1830df60db4649824c3b30461a SHA-1: d4948d8d61abfd5928d2d0cc89a19fceae6c33ba SHA-256: 0956396c1760f33163f008a0ebff9eb59782233f42fec4505374a87f87df6768
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one identified as a malicious redirector pointing to 'https://ttraff.ru/pify?keyword=ctet+2020+notification+pdf+in+telugu'. The document body, though heavily obfuscated, contains this URL and other links, suggesting a phishing or scam attempt to redirect users to malicious infrastructure. The presence of numerous external PDF links also indicates a link farm strategy, likely for SEO poisoning or to obscure the malicious redirector.

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=ctet+2020+notification+pdf+in+telugu
    • http://dezabi.kierstinbible.com/uploads/1/3/1/6/131606289/fcff9.pdf
    • http://moxasozu.remycenard.com/uploads/1/3/2/8/132814930/nedojumutoxevoda.pdf
    • http://files.emeastrategy.com/uploads/1/3/1/1/131164081/40d236d33ce2f6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/8879/6064/files/56052003773.pdf
    • https://cdn.shopify.com/s/files/1/0435/0020/8294/files/online_rent_agreement_format.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9870/files/xominu.pdf
    • https://cdn.shopify.com/s/files/1/0438/0826/0258/files/positive_emotions_definition.pdf
    • https://cdn.shopify.com/s/files/1/0433/9869/3022/files/30421601268.pdf
    • https://cdn.shopify.com/s/files/1/0431/7990/1096/files/7564297265.pdf
    • https://cdn.shopify.com/s/files/1/0433/0084/7780/files/wits_bsc_computer_science.pdf
    • https://cdn.shopify.com/s/files/1/0435/5247/3243/files/calendario_escolar_sep_2020_a_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/9928/2845/files/dakoxutavofijerabi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7079/1573/files/toliwanetapumezota.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_off00005bf7.bin
6c758d0fd721426d3b942f4175e8d0ae4332e87dc403a6ec94fcf1f6624df101
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BF7 5228 bytes
font_01_sfnt_off00006dca.bin
62215d6a5d388c1d52531344e04ab595cef0e2d68301d9fde0ad4a018b712a1b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DCA 10184 bytes