Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb09ffd227a3e188…

MALICIOUS

PDF

42.7 KB Created: 2020-08-30 00:31:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7405c016668d0a5b1ca9c992dfcaac0 SHA-1: 61b9ba5651ffe8f58445a8cc64434585580a5eff SHA-256: fb09ffd227a3e188fcccb380de85403cbb294406f342af869f9161f27dad62f0
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body appears to be obfuscated or corrupted, but the presence of numerous links, including one to `ttraff.com`, suggests a phishing or malware distribution attempt.

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/wix?keyword=nacidos+de+la+bruma+pdf
    • https://cdn.shopify.com/s/files/1/0429/6887/5157/files/6827894407.pdf
    • https://cdn.shopify.com/s/files/1/0429/3066/7673/files/unforgiven_2_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0461/8554/5891/files/parallel_sentence_structure_exercise_1_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/5491/4981/files/kifafitomefisatazid.pdf
    • https://cdn.shopify.com/s/files/1/0436/5461/1102/files/riesgo_psicosocial_definicin_formas_de_prevencin.pdf
    • https://static.usrfiles.com/ugd/b8c837_aa2cf6b96ada42b1abdcefda0868898e.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8992/files/kavikipisapajamagujoso.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4885/files/35289066039.pdf
    • https://cdn.shopify.com/s/files/1/0434/4017/7308/files/42575164906.pdf
    • https://cdn.shopify.com/s/files/1/0428/4229/2390/files/10306274149.pdf
    • https://cdn.shopify.com/s/files/1/0428/7250/4483/files/15403054609.pdf
    • https://cdn.shopify.com/s/files/1/0436/0791/6707/files/rabage.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4823/files/84133024411.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/veziwifiwevimilerebedol.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_off000065fc.bin
6544025cb9e99fbcc572003cda230bcbcc4f572256ea7eabf249ae866526a240
pdf-font-stream PDF embedded font (sfnt) at offset 0x65FC 5412 bytes
font_01_sfnt_off00007838.bin
2637c37195d98dbbda6c2eb51304f2f4611bfbb9cd41afdcb772e3ad38c47b00
pdf-font-stream PDF embedded font (sfnt) at offset 0x7838 11332 bytes