Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9195e65df63c129…

MALICIOUS

PDF

44.4 KB Created: 2020-08-16 19:31:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df595baf411b979e8c9fe718cfb2ac4b SHA-1: 30ad26c21fc3ca71ee763df2e59638dc9cfef627 SHA-256: f9195e65df63c12977b3e910e852fb702ed3bd8b691b367f2155cec4091b9b82
154 Risk Score

Malware Insights

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

The PDF file was flagged as malicious due to containing a link farm that redirects to known malicious infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/pify?keyword=pangolier+guide+7.+20, which is identified as a malicious redirector. Additionally, the file contains numerous links to Shopify-hosted PDFs, a common tactic for SEO poisoning and distributing 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.ru/pify?keyword=pangolier+guide+7.+20
    • http://files.doordoodles.com/uploads/1/3/1/4/131407918/6275a3.pdf
    • https://cdn.shopify.com/s/files/1/0445/3960/9252/files/buku_agama_islam_kelas_10_kurikulum_2020.pdf
    • https://cdn.shopify.com/s/files/1/0427/7387/2807/files/galoxik.pdf
    • https://cdn.shopify.com/s/files/1/0430/7252/0353/files/23380670975.pdf
    • https://cdn.shopify.com/s/files/1/0436/0051/1138/files/logejemewo.pdf
    • https://cdn.shopify.com/s/files/1/0436/1119/3501/files/ti_sao_file_b_li_font.pdf
    • https://cdn.shopify.com/s/files/1/0432/9707/9460/files/munekabogepipepe.pdf
    • https://cdn.shopify.com/s/files/1/0434/5538/1669/files/69943521833.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/resozelofik.pdf
    • https://cdn.shopify.com/s/files/1/0441/2506/1272/files/basel_iii_reforms.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_off00007293.bin
48e387344e0961c21143e9a4858f3ac7c212650bca4913d0c5336c5a19c8a115		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7293 5200 bytes
font_01_sfnt_off00008457.bin
111ab7bb66cd647764d0b07d0f27c9883a9a2a8b96b5c0d2fd70a68a14151cef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8457 9772 bytes

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