Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d25f9fe79333845…

MALICIOUS

PDF

80.3 KB Created: 2020-09-16 19:30:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae4da4c0ff7694f6eeb5cb7874b8da2e SHA-1: c9feae477a1ee4f2a9a2582e5af907f8a44b8b1f SHA-256: 4d25f9fe79333845996bf43017a3821c735cb08df3a59008c84dac787feaac53
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with critical heuristics identifying it as a malicious redirector and a link farm. One of the embedded URLs, 'https://ttraff.link/wix?keyword=d%2526d+curse+of+strahd+maps+pdf', is specifically flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL, indicating its likely purpose is to direct users to malicious infrastructure. No scripts were extracted, but the PDF structure and embedded links strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.link/wix?keyword=d%2526d+curse+of+strahd+maps+pdf
    • http://files.centraloregonfillyourpantry.com/uploads/1/3/2/7/132740424/7488684.pdf
    • http://lezedoxed.lafesmith.com/uploads/1/3/2/6/132695424/3463828.pdf
    • http://files.goochipoochi.net/uploads/1/3/2/7/132741352/vegotomupenit.pdf
    • https://cdn.shopify.com/s/files/1/0433/9813/5966/files/46744207844.pdf
    • https://cdn.shopify.com/s/files/1/0434/0845/7885/files/kathi_love_bgm_masstamilan.pdf
    • https://cdn.shopify.com/s/files/1/0430/1425/8851/files/nogizudixurumixev.pdf
    • https://cdn.shopify.com/s/files/1/0430/5816/7959/files/color_by_number_addition_and_subtraction_1st_grade.pdf
    • https://cdn.shopify.com/s/files/1/0435/6803/8047/files/el_existencialismo_es_un_humanismo_ensayo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6114/9850/files/ufc_226_performance_bonuses.pdf
    • https://cdn.shopify.com/s/files/1/0465/0555/8174/files/3949004722.pdf
    • https://cdn.shopify.com/s/files/1/0428/8885/5718/files/software_reliability_engineering.pdf
    • https://cdn.shopify.com/s/files/1/0430/6337/8081/files/lidopalivexiradogod.pdf
    • https://cdn.shopify.com/s/files/1/0444/2321/7318/files/41366875323.pdf
    • https://cdn.shopify.com/s/files/1/0431/6109/2250/files/lilusefobudamudenok.pdf
    • https://cdn.shopify.com/s/files/1/0438/0554/0509/files/zuvuxekagulefotoxuguxaz.pdf
    • https://cdn.shopify.com/s/files/1/0427/9179/6902/files/darrell_sheets_instagram.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4bf.bin
866fd8f85cd0130a59e26d5d2ef72782554194052287c2ce3d346dbb443db71f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BF 3484 bytes
font_01_sfnt_off0001002c.bin
acc74901c1c09107bb7d46c62efa714779ea9a8dea79575404be36d0f9d38688
pdf-font-stream PDF embedded font (sfnt) at offset 0x1002C 11796 bytes
font_02_sfnt_off0001263b.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1263B 4324 bytes