Malicious PDF — malware analysis report

Static analysis result for SHA-256 f854431f7b7ae29b…

MALICIOUS

PDF

44.7 KB Created: 2020-08-18 13:39:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b34b0ec28db18df57fae7260d79406bd SHA-1: b727297f47efaa4eedbdf1c5258a81475b819e00 SHA-256: f854431f7b7ae29b6121394d37e20a7cfc0a2aa2fe6529762385a5ee0fe5e69c
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a critical heuristic identifying it as a redirector link to known malicious infrastructure. It also contains a link farm pointing to numerous external PDFs, many hosted on Shopify. The primary malicious URL is https://ttraff.com/pify?keyword=bar%25C3%25B5es+da+pisadinha, which is likely used to lure users into a phishing or malware download scheme. No scripts were extracted, but the structure and heuristics strongly indicate a malicious redirection attempt.

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.com/pify?keyword=bar%25C3%25B5es+da+pisadinha
    • http://gerovus.texasredbuddental.com/uploads/1/3/0/8/130814011/09af52beb8d0280.pdf
    • http://files.sabrinaeisenbarth.com/uploads/1/3/1/3/131381095/4251770.pdf
    • http://files.penascoliving.com/uploads/1/3/1/4/131453124/javegase_kidasominuw_dodezotunesur.pdf
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/70146737163.pdf
    • https://cdn.shopify.com/s/files/1/0435/6397/4805/files/8635861059.pdf
    • https://cdn.shopify.com/s/files/1/0434/2756/1634/files/27167475356.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/muzoguganava.pdf
    • https://cdn.shopify.com/s/files/1/0437/1926/2357/files/73687870732.pdf
    • https://cdn.shopify.com/s/files/1/0434/2690/6264/files/bakifufawakodo.pdf
    • https://cdn.shopify.com/s/files/1/0428/6509/8908/files/90977796549.pdf
    • https://cdn.shopify.com/s/files/1/0434/6213/1869/files/72552312613.pdf
    • https://cdn.shopify.com/s/files/1/0432/1034/2559/files/judopile.pdf
    • https://cdn.shopify.com/s/files/1/0433/0035/6251/files/wemivudipezejokuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/2738/1924/files/animasi_power_point_bergerak_terbaru.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004bd4.bin
f8aa7d6ff11f5496ebc27e21ea46a57866b587d2d750cbd20b996dca9e8adc4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BD4 4880 bytes
font_01_sfnt_off00005c47.bin
fc8fb5e7648e50495512ad895cfe6145d338158d9493feb7a66c20851bff2be9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C47 11904 bytes
font_02_sfnt_off0000814f.bin
13c540cfff82c4dbf750c4d8c74e2b7b4ef1ed85145f82e59f5e6266b522e2c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x814F 16096 bytes
font_03_sfnt_off00009616.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9616 4324 bytes

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