Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d206af855b29145…

MALICIOUS

PDF

57.1 KB Created: 2020-08-10 02:33:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30d6703867dc1f1b7ade5fa893884175 SHA-1: 8045710a5f092877360294b5cdb61f5f3be2be52 SHA-256: 8d206af855b2914584258e7050215d8b8e1326446eb3e56756479975ecb3cd48
152 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous embedded URLs, including a known malicious redirector at 'https://ttraff.cc/pify?keyword=depreciacion+y+amortizacion+ejemplos+pdf'. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's designed to drive traffic to external sites. The document body, though heavily obfuscated, contains references to the redirector and other Shopify-hosted PDFs, indicating a likely attempt to disguise malicious links as legitimate 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=depreciacion+y+amortizacion+ejemplos+pdf
    • http://files.fountaincityfc.com/uploads/1/3/1/3/131398333/furojagoboxel_rosabafonowoni_rirod.pdf
    • http://gagojo.arcrestour.com/uploads/1/3/0/8/130874655/3330274.pdf
    • http://jaxaj.dreamrealtyandappraisal.com/uploads/1/3/1/3/131381464/8220676.pdf
    • http://files.triplecrownvolleyball.com/uploads/1/3/2/7/132740965/dilomibidetopa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8072/0294/files/bijadijigefuzuridibi.pdf
    • https://cdn.shopify.com/s/files/1/0429/0281/4876/files/67350026219.pdf
    • https://cdn.shopify.com/s/files/1/0432/8957/5588/files/12064196236.pdf
    • https://cdn.shopify.com/s/files/1/0433/1444/6489/files/54959561876.pdf
    • https://cdn.shopify.com/s/files/1/0432/2174/5825/files/vimifurirobadiwosat.pdf
    • https://cdn.shopify.com/s/files/1/0440/2036/7510/files/dark_souls_2_cheat_engine_table_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/5930/5880/files/fundamentals_of_analytical_chemistry_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/8803/6505/files/riwovuxa.pdf
    • https://cdn.shopify.com/s/files/1/0429/7054/6329/files/5385091886.pdf
    • https://cdn.shopify.com/s/files/1/0431/1682/2692/files/pexotedapemimudek.pdf
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/pakudidi.pdf
    • https://cdn.shopify.com/s/files/1/0427/7298/8071/files/lejusirubafuvodidis.pdf
    • https://cdn.shopify.com/s/files/1/0440/0631/0046/files/lufebagadisopuxoso.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_off00007fef.bin
aae94a642956a43c07c0513ae7b75c446a6c0ec2b3039140756c625861cde3ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FEF 5528 bytes
font_01_sfnt_off000092c2.bin
3c3ec56c0f75fd36fc0a5621c4a3d78d2bdb718f6b31a3d0963d4f26a9e7d66b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92C2 15492 bytes
font_02_sfnt_off0000c1c0.bin
d781c508aaf473e50263a6aabc3f4161b7fa10724c54bb8d35addee38a7f1c44		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1C0 16164 bytes

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